Question

Using complete sentences, explain how to completely factor 2x2 − 8x − 42.

Answer 1

take 2 out as a common factor

2(x^2 - 4x - 21)

find the factors of -21 that add to -4, .... -7 and 3

then write

2(x -7)(x +3) = 2x^2 - 8x - 42

Answer 2

thank you so much!