Question

x^4-10x^2+24=0

Answer 1

Try setting \(z = x^2\) and substituting in. It should look like a normal quadratic equation now. Factor it, and then put the \(x^2\) back in!

Answer 2

(z-4)(z-6)

Answer 3

Oops, sorry. But when you plug \(x^2\) back in, you get \((x^2-4)(x^2-6)\), and then you can factor each of those separately.