If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying r4 + 18r2 + 81 = 0 Reorder the terms: 81 + 18r2 + r4 = 0 Solving 81 + 18r2 + r4 = 0 Solving for variable 'r'. Factor a trinomial. (9 + r2)(9 + r2) = 0Subproblem 1
Set the factor '(9 + r2)' equal to zero and attempt to solve: Simplifying 9 + r2 = 0 Solving 9 + r2 = 0 Move all terms containing r to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + r2 = 0 + -9 Combine like terms: 9 + -9 = 0 0 + r2 = 0 + -9 r2 = 0 + -9 Combine like terms: 0 + -9 = -9 r2 = -9 Simplifying r2 = -9 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 '(9 + r2)' equal to zero and attempt to solve: Simplifying 9 + r2 = 0 Solving 9 + r2 = 0 Move all terms containing r to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + r2 = 0 + -9 Combine like terms: 9 + -9 = 0 0 + r2 = 0 + -9 r2 = 0 + -9 Combine like terms: 0 + -9 = -9 r2 = -9 Simplifying r2 = -9 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
| -41=47-4r | | 12(-2)+4y=-29 | | 0.6x-0.2(5-4x)=0.8(x-7) | | 8(x+2)=8x+2 | | 1x^4-8+2x^4=19 | | 7x+4-4x=3x-9+x | | 7+2(x+6)=-3+2(x-1) | | 8=7x+x^2 | | 8x-3x=2+3 | | 6-(-3-x)-2x=14 | | 2x+4y-7x-7y= | | -72=-56t | | y=2(-4.5)+8 | | 10x+90=180 | | -1.25x-3.5= | | 14x^2+42=0 | | -3x^2+20=-7 | | s^2+2s+9=0 | | x^4+4x^2+4x=0 | | x^4+4x^2+4x=9 | | 12-8x+2x=2x-8 | | a^2+b^2=1578 | | 225+x^2=1578 | | 4(x-3)=87x | | -1.25/1= | | 6x^2*4y=53y | | 100x^2y=25x | | 100x(x^2)=25 | | 2x+yx=130 | | Dx+Gx=Kforx | | 10.8-0.2=9 | | 4a+3b+c=-3 |