Question

Find solution of the equation by factoring.
x^4-20x^2+64=0

Answer 1

\[(x ^{2}-4)(x ^{2}-16)=(x+2)(x-2)(x-4)(x+4)\]

Answer 2

It is now factored and the product = zero. You can now solve the roots.

Answer 3

Thank you

Answer 4

Check your answer:\[x=\pm2\]\[x =\pm4\]