Question

Solve for the roots in the following equation.
(x^4 + 5x^2 - 36)(2x^2 + 9x - 5) = 0

Answer 1

(x^4 + 5x^2 - 36)(2x^2 + 9x - 5) = 0 means that either x^4 + 5x^2 - 36 = 0 or 2x^2 + 9x - 5 = 0

Answer 2

for x^4 + 5x^2 - 36, you can set x^2 = u so it will be u^2+5u-36 = 0, then you can use quadratic formula to solve for u.

Answer 3

For 2x^2 + 9x - 5 = 0, use quadratic formula too

Answer 4

you can never go wrong with the formula

2x^2 + 9x -5 = 0 can be factored as (x + 5)(2x - 1)= 0

@Power2Knowledge are you sure in the first expression its 36 and not 6 so it could be easily factored (u + 6)(u - 1)=0