







The center and radius of a circle 
20150206 

ariana pose la question : I need to find the center and the radius of this circle. I don't know how to put 9/2
than square it into a fraction.
x^2 + 2x + y^2 +9y=5 Penny Nom lui répond. 





Completing the square 
20091002 

christopher pose la question : how do i find the factors of x^2+3x+2 by completing the square ? Robert Dawson lui répond. 





The inverse of F(x)=x^26x+13, for x>3 
20090726 

Juan pose la question : The function F is given by F(x)=x^26x+13, for x>3.
A. Write F(x) in the form (xa)^2+b
B.Find the inverse function F^1
C.State the domain of F^1 Penny Nom lui répond. 





Completing the square 
20090427 

Daniel pose la question : I tried following an example of yours but I still couldn't figure it out.
Here is my question,
2x^2  6x + 1 = 0.
Any help would be greatly appreciated. Stephen La Rocque lui répond. 





Factor 9x^2 + 6x + 4 
20081121 

Jonah pose la question : how can i solve this by factoring: 9x^2 + 6x + 4 Harley Weston lui répond. 





A rectangle word problem 
20080410 

Nick pose la question : A rectangle is twice as long as it is wide. If the length and width are both increased by 5cm, the resulting rectangle has an area of 50cm^2. Find the dimensions of the original. Penny Nom lui répond. 





Complete the square 
20080409 

jessica pose la question : can you check my answer please thanks
f(x)=2x^24x+5
I got 2(x+2)^23 for when it asked to simplfy it to standard form of a quadratic
equation Stephen La Rocque lui répond. 





Complete the square 
20080409 

jessica pose la question : Use the technique of completing the square to put f(x)= 2x^24x+5
in the form f F(x)= a(xh)^2+k were h,k=vertex of the parabola.
identify the coordinate (h,k)of the maximum or minimum point
of the associated parabola Penny Nom lui répond. 





More on completing the square 
20071129 

June pose la question : x^2  6x = 16 I found you already had this question but the answer you gave did not help me to explain how to answer the problem for my daughter. I do not understand how to complete the square for this paticular question and the example you showed did not help. I would appreciate any further help you could give me. Penny Nom lui répond. 





Finding the center of an ellipse 
20070620 

Sima pose la question : find the center of the ellipse with the equation 3x^2 +4y^2+18x32y5=0 Penny Nom lui répond. 





Solving x^23x+5=0 
20011130 

Katy pose la question : How do you find the solution to x^{2}3x+5=0? Penny Nom lui répond. 





The Quadratic Formula 
19990122 

Eric Morgan pose la question : Hi my name is Eric Morgan and I m in 8th Grade honors math (middle) and I'd like to know how to prove the quadratic formula b±sqrt of b(a)(c)over 2(a) Penny Nom lui répond. 

