Question

find the value of x..given tht x^4-15x^2-34=0

Answer 1

Let a=x^2 then,
a^2 -15a -34=0
Now, find the value of a then find x

Answer 2

15x^2 - 34 = 0?

Answer 3

u just change x to a

Answer 4

No, replace x^2 with a. So it becomes
\[a^2 -15a -34=0 \]
then you can factorize:
(a-17)(a+2)=0

so a = 17 and a = -2. And remember a=x^2.

Answer 5

Looks like you should get four solutions, two real and two imaginary.