SOLUTION: Please help me solve x^4

SOLUTION: Please help me solve x^4 - 9 ?

Question 287637: Please help me solve x^4 - 9 ?
Found 2 solutions by Grinnell, richwmiller:
Answer by Grinnell(63) (Show Source): You can put this solution on YOUR website!
How can we put this in familiar form?
9 and 4 are perfect squares. These are hints at something.
we know a^2-b^2 = (a+b)(a-b)
we can do this! x^2^2-3^2=(x^2+3)(x^2-3)=0
3^2+3=0, x=Square root of 3i
3^2-3=0, x=Square root of 3
This is not as complicated as it looks, but you must use the common products of Algebra AND be on the look-out for perfect squares either in the exponents or the real numbers themselves.
square root of 3i AND the square root of 3 are the answers.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
To be solved there must be an equal sign.
Otherwise it can be factored or simplified but not solved.
let u^2=x^4 so u=x^2
u^2-9=
(u-3)*(u+3)
(x^2-3)*(x^2+3)

RELATED QUESTIONS
please help me solve 2log3(x+4)-log3... (answered by scott8148)
Please help me solve for x:... (answered by stanbon)
Please help me solve the equation. -4(x-9)=-8. Thanks for all of your... (answered by checkley71)
Can you help me solve this equation please? 1. 9/x = 4/3x + 1 x = ? (answered by ankor@dixie-net.com)
Please help me solve this problem: 9 x 10^-4 /3 x 10^-6 Thank... (answered by Fombitz)
Please help me solve this equation ...... (answered by ikleyn)
Please help me solve {{{4^x=8x}}} (answered by Fombitz)
Please help me to solve this: 3e^-x - 4 = 9 thanks... (answered by Nate)
Please help me solve this equation: 9=-4(x+1)-2. (answered by mando271)