Which equation is a step in solving 2x2 - 8x + 3 = 0 by completing the square.

Select one:
a.
2(x2 - 4x + 4) = -3 + 8
b. 2(x2 - 8x + 16) = - 3 + 32
c. 2(x2 - 4x + 2) = -3 + 4
d. 2(x2 - 4x + 4) = -3 + 4

Question

Which equation is a step in solving 2x2 - 8x + 3 = 0 by completing the square.

Select one:
a. 
2(x2 - 4x + 4) = -3 + 8
b. 2(x2 - 8x + 16) = - 3 + 32
c. 2(x2 - 4x + 2) = -3 + 4
d. 2(x2 - 4x + 4) = -3 + 4

1645323 · Answer

@SolomonZelman

1645323 · Answer

is it A or C?

solomonzelman · Answer

I never thought of these problems this way. I learned ths in a standard way if you know what I mean.

I know that I would have t factor out of 2 to make a perf. sq. on a left side.
(x^2-4x+4) would be my perfect square

e.i. (b/f factoring out of 2, it would be , 2x^2-8x+8


would do I need to add/subtract from both sides to get 2x^2-8x+8 on the left side?
I would be adding 5. 

SO

2x^2 - 8x + 3 = 0
2x^2 - 8x + 3 + 5 = 0 + 5
2x^2 - 8x + 8=  5
2(x^2-4x+4)=5


so I would say that all of your choices are WRONG, b/c where do you get the 4 from ?

solomonzelman · Answer

most accurate one is D, but D is also WRONG WRONG and WRONG -:(