What integer needs to be added to the expression to create a perfect square? x^2 - 2x

A. -4
B. -1
C. 1
D. 4

Question

What integer needs to be added to the expression to create a perfect square? x^2 - 2x

A.	-4
B.	-1
C.	1
D.	4

anonymous · Answer

The answer is D, 4.

solomonzelman · Answer

-x + -x is what gives you the middle term of -2x    (-x is same as -1x)
so -1 times -1 would give you the last term

solomonzelman · Answer

Not D!

anonymous · Answer

@SolomonZelman is that all you have to do for these types of problems?

solomonzelman · Answer

Good luck with the rest of completing the square problems :D

solomonzelman · Answer

I am glad that you caught on fast!

anonymous · Answer

Thanks for your help!(:

solomonzelman · Answer

you meant :) not (: b/c the one you wrote means you are upset

anonymous · Answer

:o Really?

solomonzelman · Answer

yeah :D

solomonzelman · Answer

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