SOLUTION: 16x^2-36=? 9x^2+81=?

Algebra ->  Equations -> SOLUTION: 16x^2-36=? 9x^2+81=?      Log On


   

Question 75945: 16x^2-36=?
9x^2+81=?
Answer by funmath(2933) About Me  (Show Source):
You can put this solution on YOUR website!
Are you supposed to be factoring or solving for x?
16x^2-36=?
This is the difference of perfect squares the rule for that is highlight%28a%5E2-b%5E2=%28a%2Bb%29%28a-b%29%29.
%284x%29%5E2-%286%29%5E2=%284x%2B6%29%284x-6%29
:
9x^2+81=?
This is the sum of perfect squares and is prime. It can't be factored or solved unless you have started using the complex number system.
:
If you have started using complex numbers or need these solved for x let me know.
Happy Calculating!!!