9x^4-81x^2=0

Simple and best practice solution for 9x^4-81x^2=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 9x^4-81x^2=0 equation:


Simplifying
9x4 + -81x2 = 0

Reorder the terms:
-81x2 + 9x4 = 0

Solving
-81x2 + 9x4 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '9x2'.
9x2(-9 + x2) = 0

Factor a difference between two squares.
9x2((3 + x)(-3 + x)) = 0

Ignore the factor 9.

Subproblem 1

Set the factor 'x2' equal to zero and attempt to solve: Simplifying x2 = 0 Solving x2 = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x2 = 0 Take the square root of each side: x = {0}

Subproblem 2

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Subproblem 3

Set the factor '(-3 + x)' equal to zero and attempt to solve: Simplifying -3 + x = 0 Solving -3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + x = 0 + 3 x = 0 + 3 Combine like terms: 0 + 3 = 3 x = 3 Simplifying x = 3

Solution

x = {0, -3, 3}

See similar equations:

| 4/5(x+5)=7/8(3x+23)-7 | | 2(2n-3)=(7n+4)+2 | | 5(x+1)+2(x-3)=13 | | 10x+10=10x+10 | | (-2)=4x^2-2x-25 | | 15x-56x=x^2 | | 4-.025x=.1-.05x | | 3x^2-13x+4= | | 3x+8-5x=12 | | 4x^2+8x-35=0 | | 2+3x=9x-34 | | -18=-2/5(15n-45) | | x+7=x+4 | | 3(x+5)+4(x-3)=17 | | .3x-5.5=.2x+2.6 | | 2x+3(3x+2)=17 | | 6[4(8-4)-5(9+3y)]-21=7[3(7+4y)-4] | | 4+(3+n)=9 | | 7(3n-4)=(7n+7)+5 | | 3b-8=-6+d | | 6n=96 | | 6[4(8-4)-5(9+39)]-21=7[3(7+4y)-4] | | 6(x+5)=5(x-6)+x | | 7x-5=4(x+1)+3x-9 | | 9n=96 | | (3+x+7)+1= | | x+5=-6x+75 | | m^3+20m^2+100m=0 | | 7X+9Y=4 | | 4x+21=12x+51 | | 3n^2-48n+192=0 | | t^2-40t-64=0 |

Equations solver categories