Question

Solve for the roots in the following equation. Hint: Factor both quadratic expressions.
(x^4 + 5x^2 - 36)(2x^2 + 9x - 5) = 0

Answer 1

2x6+9x5+5x4+45x3−97x2−324x+180

Answer 2

\[
\left(x^4+5 x^2-36\right) \left(2 x^2+9 x-5\right)=(x-2) (x+2) (x+5) (2
x-1) \left(x^2+9\right)=0
\]

Answer 3

http://www.wolframalpha.com/input/?i=factor+%28x^4+%2B+5+x^2+-+36%29+%282+x^2+%2B+9+x+-+5%29