Question

Use the grouping method to factor 4x3 + 20x3 - 3x - 15

Answer 1

12+20•3-3x-15

multiply the numbers : 20•3 = 60

12+60-3x-15

group like terms

-3x+12+60-15

add and subtract the numbers : 12+60-15=57

final answer = -3x+57