Question

16y^2-25x^2 does it factor out to be (y^2-5x) (4Y+5x) ?

Answer 1

nope

Answer 2

okay so wouldn't I factor out the two sq. numbers first and that would be the factoring ?

Answer 3

Start by realizing that the problem is about the difference between two perfect squares. This form in general is: a^2 - b^2 which is factored by (a + b)(a - b). The difference in sign allows ba (which is the same as ab) to cancel with -ab, so that you have 2 terms instead of four. Use this same approach to the above problem.

Answer 4

Would the answer be (4y+5x) (4y-5x)

Answer 5

Yes! You got it!

Answer 6

Thank you and do you know how to solve for cubed roots?