Question

Factor by grouping: 4x3 - 6x2 + 10x - 15.
a. (4x3 - 15)(10x - 6x2)
b. (2x2 + 5)(2x - 3)
c. (2x2 - 5)(2x + 3)
d. (4x3 - 6x2)(10x - 15)

Answer 1

4x³ - 6x² + 10x - 15
2x²(2x) - 2x²(3) + 5(2x) - 5(3)
2x²(2x - 3) + 5(2x - 3)
(2x² + 5)(2x - 3)

The answer is B.