18x+81=-x^2

Simple and best practice solution for 18x+81=-x^2 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 18x+81=-x^2 equation:


Simplifying
18x + 81 = -1x2

Reorder the terms:
81 + 18x = -1x2

Solving
81 + 18x = -1x2

Solving for variable 'x'.

Combine like terms: -1x2 + x2 = 0
81 + 18x + x2 = 0

Factor a trinomial.
(9 + x)(9 + x) = 0

Subproblem 1

Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9

Subproblem 2

Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9

Solution

x = {-9, -9}

See similar equations:

| 12s-4t+7t-3s= | | 5-2(3x^2-2x)=x^2+7-2x^2 | | 5A(3B)4= | | -4[6z+2+4(z+1)]=4z-7 | | x+80-43-190=47 | | -4+7(x+7)=87 | | -45=-4x+2x+x+2 | | (3a+2)7= | | 13x^2+13y^2-26y=8 | | x+15-28+5=177 | | -15=7-2x | | 2x-8=x-7 | | -8b+5+6b=-3b+10 | | 3b^2+5b-35=0 | | 5x+17=47 | | 16x^2+11x-5=0 | | 2(6p-3)=p+7p-2p | | (3x+1)(x-5)=2 | | 93x+109x-50=2 | | x*(x+4)=60 | | k^2+36=12k | | 5x+x^2=-3 | | 16x^2+79x-5=0 | | 16x^2-38x-5=0 | | -30=8x-9x-6 | | 0=2x^2-3x-2 | | -2y=10x-4 | | 16+7X=8X-5+6X | | (9t+7)(4t+5)=0 | | Y=2x^2-3x-2 | | 16x^2-11x-5=0 | | y+2x=-5 |

Equations solver categories