Question

Solve: x^4-34x^2=-225

Answer 1

solve for "x" right ?

Answer 2

x^4-34x^2 = -225.
let y= x^2,then above equn becomes y^2-34y = - 225.
y^2 - 34y + 225=0.

Answer 3

then factor y^2 - 34y + 225=0

Answer 4

it becomes (y-25)(y-9)

Answer 5

now substitute the y by x^2 and solve for the x

Answer 6

the answer would be x=+5 or x=+3
do you know how i got that or should me and @helpme1.2 guide you step by step if you want