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

Answer 1

The answer is D, 4.

Answer 2

-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

Answer 3

Not D!

Answer 4

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

Answer 5

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

Answer 6

I am glad that you caught on fast!

Answer 7

Thanks for your help!(:

Answer 8

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

Answer 9

:o Really?

Answer 10

yeah :D

Answer 11

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