Question

Factor by grouping:
30x to the third power-42x square+5x-7=

Answer 1

30x^3 - 42x^2 + 5x - 7
(30x^3 + 5x) + (-42x^2 - 7)
5x( 6x^2 + 1) - 7(6x^2 + 1)
(6x^2 + 1) (5x - 7)