Question

x^4-25^2+144=0

Answer 1

x^4-25^2+144=0
u=x^2
u^2-25u+144=0
(u-9)(u-16)=0
u=9 u=16
x^2=9 x^2=16
solve

Answer 2

\[x^4-25x^2+144=0\] is this ur equation??

Answer 3

oh the 25^2 is supposed to be 25x^2.....sorry.

Answer 4

Don't forget to substitute back for u

Answer 5

yes @TheViper

Answer 6

\[x^4-9x^2-16x^2+144\]

Answer 7

\[x^2(x^2-9)-16(x^2-9)\]

Answer 8

\[=>(x^2-16)(x^2-9)\]

Answer 9

That's ur ans.:)

Answer 10

those aren't my numbers?........or was that an example of the same?

Answer 11

What do u want to say??

Answer 12

the numbers you replied with aren't the same from the question..

Answer 13

No ans should be this
do u know the ans if yes than reply it plz:)

Answer 14

@TheViper You can further factor that sinc eit says factor completely

Answer 15

There are 2 difference in squares there.

Answer 16

Actually, @.Sam. has done most for you..
x^4-25x^2+144=0
(x^2-9)(x^2-16)=0
(x^2-9)=0 or (x^2-16)=0
x^2 = 9 or x^2 =16
\(x=\pm 3\) or \(x=\pm4\)

Answer 17

Oh I factor that eq.
u want to solve for x

Answer 18

Thanks @RolyPoly @Calcmathlete @TheViper@.Sam.

Answer 19

U r welcome @teun7840