Question

how do I factor this: 4x^8-61x^4+225

Answer 1

let x^4 = a

that will give you a factorable quadratic equation :DDD

Answer 2

i have never solved a problem where the exponent or the power was to an 8 idk where to go with this one

Answer 3

like i said...substitute x^4 to a..so that x^8 will become a^2..you'll have a quadratic equation

Answer 4

ohh okay

Answer 5

okay i got it now thanks

Answer 6

dont forget to change back to x^4 after getting the value of a! :DDD

Answer 7

okay