Question

Factor 5a^4 – 5a completely.

A. 5a(a – 1)(a^2 + a + 1)

B. 5a(a^3)

C. 5a(a + 1)(a^2 – a + 1)

D. 5a(a – 1)(a + 1)

Answer 1

Help? anyone

Answer 2

it's the first one, A.

Answer 3

5a^4-5a = 5a(a^3-1)=5a(a-1)(a^2+a+1)

Answer 4

you have the formula\[ a^{3} +/- b^{3} = (a +/- b)(a^{2} -/+ ab + b^{2})\]

Answer 5

Thank you!!!! I understand it now! THANKS :)

Answer 6

you're welcome. :)