SOLUTION: Find the real solutions of the equation 2x4

SOLUTION: Find the real solutions of the equation 2x4 - 128x2 = 0 by factoring.

Question 1065655: Find the real solutions of the equation 2x4 - 128x2 = 0 by factoring.

Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
2x^4 - 128x^2 = 0
:
factor 2x^2
:
2x^2 * (x^2 - 64) = 0
:
we have two cases
:
1) 2x^2 = 0
x = 0
:
2) x^2 - 64 = 0
x = 8 and x = -8
:
*********************************
x = 0, 8, -8
:
check our answers
:
(2 * 0^4) - (128 * 0^2) = 0
0 = 0
:
(2 * 8^4) - (128 * 8^2) = 0
8192 - 8192 = 0
0 = 0
:
(2 * (-8)^4) - (128 * (-8)^2) = 0
8192 - 8192 = 0
0 = 0
:
our answers check
**********************************
:
RELATED QUESTIONS
Find the real solutions of the equation 2x4 - 128x2 = 0 by... (answered by Boreal)

Find the real solutions of the equation by factoring:... (answered by nerdybill)

Find the real or imaginary solutions of each equation by factoring.... (answered by josmiceli)

find the real or imaginary solutions of each equation by factoring. 64x^3=-8 (answered by ankor@dixie-net.com)

Find all real solutions of the equation. (Enter your answers as a comma-separated list.... (answered by ewatrrr)

what is the real solutions of the equation by factoring: x to the 3rd power + 2x square... (answered by Tatiana_Stebko)

The number of real roots of the equation 2x4 + 5x2 + 3 = 0 is what (answered by scott8148)

The number of real roots of the equation 2x4 + 5x2 + 3 = 0... (answered by scott8148)

Help me find the real solutions of the equation by factoring: x to the 3rd power +... (answered by jim_thompson5910)