Question

Solve:
X^4-13X^2+36=0

Answer 1

This is a quadratic in disguise. (x^2)^2 - 13x + 36.

Answer 2

SO DO I JUST use the quadratic formula?
a=1
b=-13
c=36

Answer 3

yes. Solve that. But, remember, you have to remember to square it, because you are really solving for (x^2) SQUARED. So, just remember to square it (or just plug it into (x^2)^2 - 13x + 36.

Answer 4

i got answers of x=9 and x=4