Answer:
He has 45 kids now.
Step-by-step explanation:
21
3x-7=-21
-21x-1=21
hope this helps, brainliest is always appreciated :3
3x^3 + 6x^2 - 24x
= 3x(x^2 + 2x - 8)
= 3x(x + 4)(x - 2)
Hope it helps.