## Intermediate Algebra for College Students (7th Edition)

$0,-2,2$
Given: $5x^4-20x^2=0$ or, $5x^2(x^2-4)=0$ Need to use factorization to solve the quadratic equation. This can be factorized as follows: $5x^2(x^2-2^2)=0$ or, $5x^2(x-2)(x+2)=0$ Set each factor equal to zero, we get $x=0,-2,2$