x*x-3x-18=0

Simple and best practice solution for x*x-3x-18=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*x-3x-18=0 equation:


Simplifying
x * x + -3x + -18 = 0

Multiply x * x
x2 + -3x + -18 = 0

Reorder the terms:
-18 + -3x + x2 = 0

Solving
-18 + -3x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-3 + -1x)(6 + -1x) = 0

Subproblem 1

Set the factor '(-3 + -1x)' equal to zero and attempt to solve: Simplifying -3 + -1x = 0 Solving -3 + -1x = 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 + -1x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1x = 0 + 3 -1x = 0 + 3 Combine like terms: 0 + 3 = 3 -1x = 3 Divide each side by '-1'. x = -3 Simplifying x = -3

Subproblem 2

Set the factor '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 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 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Divide each side by '-1'. x = 6 Simplifying x = 6

Solution

x = {-3, 6}

See similar equations:

| 4(v-5)-6v=-38 | | 180/10+20+20*3-18/2 | | X=cr | | x-4(2x^1/2)=10 | | r^3-4r^2-9r+36= | | 40.00h=760.00 | | -.5*32x^2+24x+60=68 | | 8/v+2+3/3v+6 | | 8d^3-6d^2=d | | 3x+2x=8x | | 8d^3-6d^2=0 | | (4q)^7/(4q)^14 | | 5Y-6=29-Y | | (6+2x)(12+2x)=160 | | -.5*32x^2+24x+60=0 | | 5y^3/8*3/y=15y/8 | | 2y+5*(2+2y)+11y+5*(10-4y)=66 | | 2(3y-2)-30=5y | | 1.25p=0.75p+35.00 | | x^7(x+1)=4(x+1) | | 0.75p+35.00=125.00 | | y^3=8 | | -.5*32x^2+64x+0=60 | | x^3+3x^2+3x+24= | | graphy=x^2+5x+6 | | Y+y=9 | | 3(m-9)+36=4m | | 5*x-81=30 | | 36c^2+6c-12=0 | | 25x^2+25x+1=0 | | 6+3lnx=8 | | 3(m-9)+24=4m |

Equations solver categories