Question

how do i factor this: 27a^4 - 147

Answer 1

27a^4 - 147


3(9a^4 - 49)


3(3a^2-7)(3a^2+7)

Answer 2

so basically you just expand it as much as you can once you have gotten the GCF?

Answer 3

yes, use the difference of squares formula to factor once you've factored out the GCF

Answer 4

sorry what is the difference of squares formula? i have a tough time understanding my teacher..

Answer 5

the difference of squares formula is


a^2-b^2 = (a-b)(a+b)

Answer 6

it's a tool to help factor

Answer 7

okay thank you so much for the help!!