SOLUTION: what is (4a^2+12ab+9b^2-25c^2) factored? and I know the answer is (2a+3b+5c)(2a+3b-5c) I just dont understand how to get there....thanks

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: what is (4a^2+12ab+9b^2-25c^2) factored? and I know the answer is (2a+3b+5c)(2a+3b-5c) I just dont understand how to get there....thanks       Log On


   

Question 524708: what is (4a^2+12ab+9b^2-25c^2) factored? and I know the answer is (2a+3b+5c)(2a+3b-5c) I just dont understand how to get there....thanks
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
%284a%5E2%2B12ab%2B9b%5E2-25c%5E2%29
%282a%2B3b%29%5E2+-+%285c%29%5E2
Use identity +a%5E2-b%5E2=%28a%2Bb%29%28a-b%29
%282a%2B3b%2B5c%29%2A%282a%2B3b-5c%29