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quadratic equations

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Two quadratic equations 2014-11-20
rajesh pose la question :
Sir,
I would like to discuss on question-
-Find the value of variable X and Y, equations are
X2+Y2+2XY=25
X2+Y2-2XY=1

Sir, my point is equation looks not so easy.My opinion is there many (more than 4)value possible for both X and Y.
Kindly help me.
Waiting for your response.
regards,
rajesh

Penny Nom lui répond.
Two quadratic equations 2012-11-22
fahmie pose la question :
graph and solve the intersection of the following equations:
x^2+y^2=4
x^2+2y=4

Penny Nom lui répond.
A picture with a frame 2011-08-19
Aniish pose la question :
A picture 8inches by 12inches is placed in a frame of uniform width. If the area of the frame equals the area of the picture find the width of the frame?
Penny Nom lui répond.
A piece of string 8 inches long is cut in two pieces 2010-02-02
Susan pose la question :
If you have a piece of string 8 inches long and cut it in two pieces. Then take the pieces and forms each into a square such that the area of each squares added together equals 2. How long are the sides of the squares?

Susan

Penny Nom lui répond.
Quadratic equations 2009-08-30
jovian pose la question :
how can i find the quadratic equation of the roots 2/5 and -1/3?
Stephen La Rocque lui répond.
Quadratic equations arising from practical problems 2008-11-24
Lenval pose la question :
Why do quadratic equations arising from practical problems often give physically impossible solutions such as negative distances, negative times or, say, a polygon with a negative number of sides? For example: "A river in flood carries a tree t-squared - 23t metres downstream in t seconds. How long does it take for the tree to be carried 50 metres downstream?" This gives t=25 and t=-2. Please explain the second 'solution', which is not physically possible.
Chris Fisher and Victoria West lui répond.
3y^2 - 48 = 0 2008-06-23
marquis pose la question :
3y^2 - 48 = 0
Stephen La Rocque lui répond.
Problems solved using quadratic equations 2007-10-07
Lisa pose la question :
a. Two positive numbers differ by 5. Their product is 234. What are the two numbers? b. The sum of two numbers is 12. Their product is 30. What are the two numbers? c.Two numbers differ by 5. Their squares differ by 55. What are the two numbers? d. The sum of two numbers is 15. Their product is 56. By forming an equation, find the two numbers.
Penny Nom lui répond.
Fencing a field 2007-02-01
Carol pose la question :
"The area of a rectangular field is 1200m^2. Two parallel sides are fenced with aluminum at $20/m. The remaining two sides are fenced with steel at $10/m. The total cost of the fencing is $2200." What is the length of each side fenced with aluminum and steel?
Stephen La Rocque lui répond.
Solving some quadratic equations 2004-07-15
A student pose la question :
Could you please solve the following for x

x2+6=5x
x2+16=8x
2x+21=3x2

Penny Nom lui répond.
The product of the page numbers 2003-11-07
Morgan and Mom pose la question :
You open a book and the product of the page numbers is 12,656. What are your page numbers?
Penny Nom lui répond.
Quadratic equations 2002-12-10
Katie pose la question :
just bugging the hell outta me and I cannot figure it out for the life of me.

1)x-2x-1 =0
Find both roots. You must simplify both of your roots. This equation requires the use of the Quadratic Formula. I have tried everything for this and I am still either getting the wrong answers, and end up getting really frustrated. If you could find the answers and tell me how you did it I would greatly appreciate it! Then the second problem is

2) The square of a certain negative number is equal to 70 decreased by 3 times the number. Find the answer! On this one I set it up but still came out with the wrong answer. So if you could help me on this one I would greatly appreciate it!

Penny Nom lui répond.
A right-angled triangle 2001-12-13
Pamela, Jeff, Kayleigh and Jacob pose la question :
A right-angled triangle has one side that is 8 cm shorter that the hypotenuse. The other side is 1 cm shorter than the hypotenuse. Find the length of the sides.
Penny nom lui répond.
Quadratic equations 2001-03-11
Philip pose la question :
I am a student in the UK and i am in secondary school and i am doing my GCSE next year.

here are my questions:

solve the following equations correct to 2 decimal each time.

[1] 2xsquared + 5x = 1

[2] 3xsquared(2x+1)=1

[3] xsquared + 7x + 2 = 2x + 4

[4] 5xsquared - 3x = xsquared + 4


Penny Nom lui répond.
Quadratic 2000-01-26
Karen Johnson pose la question :
What is the reasoning behind the title quadratic equation?
Penny Nom lui répond.
A ladder problem 1999-04-22
Michael Blade pose la question :
There is a cube box 3feet x 3feet x 3ft resting against a vertical wall on level ground. Resting against the outside corner of the box is a ladder 10 feet tall, this ladder is of course resting on the ground but also against the outside corner of the box and rests on the wall.

The question- the ladder is divided into two unequal section bounded by the box to the ground and the box to the wall. what are those dimensions?
Penny Nom lui répond.

Quadratic equations 1999-03-31
Ken Niebergall pose la question :
#1 a2 - 10a = 2a - 36

#2 t(t - 5) = 5 (t - 5)

#3. (x + 4)(x - 3) = 8

Thanks.
Jack LeSage and Penny Nom lui répond.

Find the Numbers. 1997-12-28
Sandy C pose la question :
The sum of the squares of two numbers is 53. Twice the greater, minus the lesser is 11. Find the numbers.
Penny Nom lui répond.
 
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