Question

Which equation below represents y= x2 - x - 30 after the first step of the factor by grouping process?

A. y = x2 + 5x + 6x - 30
B. y = x2 + 5x - 6x - 30
C. y = x2 - 5x - 6x + 30
D. y = x2 + 5x - 6x + 30

Answer 1

B. y = x^2 + 5x - 6x - 30

Explanation:

The equation you have after the first step needs to be equivalent to the equation you started with. That is, the x-terms need to sum to -x, and the constant needs to be -30.

Only one answer choice meets these requirements.

y = x^2 + 5x - 6x - 30