Question

Teresa is factoring this polynomial by grouping. Which common factors should be used in the next step of factoring? 10x3 3x2−20x−6 (10x3 3x2) (−20x−6) x2 and −2x 2x2 and −2x x2 and −2 2x2 and −2.

Answer 1

−2=−2x^3

Explanation:

10x3= 3x2−20x−6=(10x3⋅(3x2))(−20x−6)=−600x6−180x5x2=−600x6−180x5−2x⋅(2x2)=−4x3−2x⋅x2=−2x^3

−2=−2x3

2x^2=−2x^3

−2=−2x^3

Answer 2

> The correct choice is C) x2 and −2

Explanation:

> This is the only answer choice that makes sense in this equation.