Which of the following shows the square completed in the this equation?
x2 + 3x - 5 = 0
A. (x + 9)2 = 14
B. (x - 3)2 = 8
C. (x + 1.5)2 = 7.25

Question

Which of the following shows the square completed in the this equation?
x2 + 3x - 5 = 0
	A.	(x + 9)2 = 14
	B.	(x - 3)2 = 8
	C.	(x + 1.5)2 = 7.25

turingtest · Answer

do you know that completing the square on$$ax^2+bx+c=0$$means first adding$$(\frac{b}{2a})^2$$to both sides?

anonymous · Answer

no

turingtest · Answer

do you know the quadratic formula?

turingtest · Answer

Basically I'm asking if you can recognize what a, b, c are in your particular polynomial.

anonymous · Answer

no

anonymous · Answer

welll yes but still confused

earthcitizen · Answer

can u add half the square root of the co-efficient of b to both sides?

earthcitizen · Answer

rather a not b

turingtest · Answer

a is the number next to the x^2 term
b is the number next to the x term
c is the number that is all alone
that is how you can recognize which is which for your problem.

turingtest · Answer

I will tell you one of them
a=1
because there is no number next to x^2, so that means its coefficient is 1.
So what are tho other numbers: b and c ?

anonymous · Answer

You should watch this video: http://www.khanacademy.org/video/completing-the-square?playlist=Algebra

anonymous · Answer

Answer is C