5x^2+21x=-18

Simple and best practice solution for 5x^2+21x=-18 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 5x^2+21x=-18 equation:


Simplifying
5x2 + 21x = -18

Reorder the terms:
21x + 5x2 = -18

Solving
21x + 5x2 = -18

Solving for variable 'x'.

Reorder the terms:
18 + 21x + 5x2 = -18 + 18

Combine like terms: -18 + 18 = 0
18 + 21x + 5x2 = 0

Factor a trinomial.
(3 + x)(6 + 5x) = 0

Subproblem 1

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 2

Set the factor '(6 + 5x)' equal to zero and attempt to solve: Simplifying 6 + 5x = 0 Solving 6 + 5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 5x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + 5x = 0 + -6 5x = 0 + -6 Combine like terms: 0 + -6 = -6 5x = -6 Divide each side by '5'. x = -1.2 Simplifying x = -1.2

Solution

x = {-3, -1.2}

See similar equations:

| 6x(6x)+1=1 | | 7x-3(3x+7)=-9 | | 0(0)-4=4 | | -4+4(-4x+9)=-64 | | 5x^2-8x=6 | | 3x+2(x-5)=4 | | -4+4(-4x+9)=-74 | | 2y+2x=2 | | 5x^2+5=-13x | | 9x^3-3x^2-2x=0 | | -4x-4(-4x+9)=-64 | | 9x^2+16=-25 | | 4(3w-2)=52 | | 2ln(x)-ln(x+2)=0 | | 3y+5.2=2-5 | | 6x+30-5x=25 | | 3(3x-2)=25.3 | | 12xy-xy-y^2= | | x-0.20x=25 | | 3c^2-5c-12=0 | | -2x+3(2x+7)=-23 | | -x+3y=-12 | | y^2-28=3y | | -9+4x=2x+9 | | 6w^2+5wp-21p^2= | | x-67=-6x+17 | | 5a=7-b | | -31+6x=-3x+32 | | 10=2m-4m | | b^2-23b+60=0 | | 16+8p=24.00 | | 6x-53=-3x+55 |

Equations solver categories