x^4+18x^2-7x^2-126=0

Simple and best practice solution for x^4+18x^2-7x^2-126=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for x^4+18x^2-7x^2-126=0 equation:


Simplifying
x4 + 18x2 + -7x2 + -126 = 0

Reorder the terms:
-126 + 18x2 + -7x2 + x4 = 0

Combine like terms: 18x2 + -7x2 = 11x2
-126 + 11x2 + x4 = 0

Solving
-126 + 11x2 + x4 = 0

Solving for variable 'x'.

Factor a trinomial.
(-18 + -1x2)(7 + -1x2) = 0

Subproblem 1

Set the factor '(-18 + -1x2)' equal to zero and attempt to solve: Simplifying -18 + -1x2 = 0 Solving -18 + -1x2 = 0 Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + -1x2 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + -1x2 = 0 + 18 -1x2 = 0 + 18 Combine like terms: 0 + 18 = 18 -1x2 = 18 Divide each side by '-1'. x2 = -18 Simplifying x2 = -18 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(7 + -1x2)' equal to zero and attempt to solve: Simplifying 7 + -1x2 = 0 Solving 7 + -1x2 = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x2 = 0 + -7 -1x2 = 0 + -7 Combine like terms: 0 + -7 = -7 -1x2 = -7 Divide each side by '-1'. x2 = 7 Simplifying x2 = 7 Take the square root of each side: x = {-2.645751311, 2.645751311}

Solution

x = {-2.645751311, 2.645751311}

See similar equations:

| x^8-11x^4-x^2=0 | | 2y+2y-2y=24 | | a-2b+1=0 | | 49x^2+49x=0 | | 49x^2+29x=0 | | 8x-5=5x+22 | | 2x+25=8x-5 | | 12m+2n-3m+9n= | | x+14=5x+2+3x+18 | | 2*34-4*34=x | | y^2+25x^2-50x=0 | | 2*34-4*34= | | 34+(12-4)= | | 5ex-5=3ex-7 | | 7x^2-14x=56 | | 5z+-6+-3z=0 | | 9+8x=33 | | 6x+16=14x+5 | | x^2-22x-30=0 | | 5x-9=3x+9 | | 5(1x?5)= | | 2(4x+6)=23 | | 8(x+7)=32+2x | | 2x/x+1=2/3 | | -6=4+a+a | | 36=a+a+4 | | -12x^0=0 | | 3x+15=9x-27 | | 5=4x+11 | | 8x+5x=24+x | | 3a-2(2a-5)=2(a+3)-8 | | 12m^2+27=0 |

Equations solver categories