Question

Which expression is equivalent to (x2 − 8) − (−2x2 + 4)?

Answer 1

3x^2-12

Explanation:

Just took it on USATestPrep, if that's where the question came from! ;)

Answer 2

Answer: 6(x-2)

Explanation:

(x·2-8)-(2x·2+4)

(2(x-4))+2x·2-4

2(x-4)+2x·2-4

2(x-4)+4x-4

2(x-4+2x-2)

2(3x-4-2)

2(3x-6)

2·3(x-2)

6(x-2)