Question

Subtract 7x-9 from 2x^2-11 A) 2x^2-7x-2 B) 2x^2+7x-20 C) 2x^2+7x-2

Answer 1

Answer:

the correct answer is B) 2x^2-7x-2

because:

2x^2 - 11 - (7x - 9)

2x^2 - 11 - 7x + 9

2x^2 - 7x - 2

Answer 2

We keep the 2x^2 because we can only subtract something from that if it also is squared. From there, we subtract the 7x from 2x^2-11. Since there is no previous x's in the 2x^2-11, we just make it -7x. So, without even continuing the problem, we see that A) is the correct answer because it is the only one with -7x.