x^2-x-9=3

Simple and best practice solution for x^2-x-9=3 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^2-x-9=3 equation:


Simplifying
x2 + -1x + -9 = 3

Reorder the terms:
-9 + -1x + x2 = 3

Solving
-9 + -1x + x2 = 3

Solving for variable 'x'.

Reorder the terms:
-9 + -3 + -1x + x2 = 3 + -3

Combine like terms: -9 + -3 = -12
-12 + -1x + x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-12 + -1x + x2 = 0

Factor a trinomial.
(-3 + -1x)(4 + -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 '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-3, 4}

See similar equations:

| z/4=-7 | | -24+3x=6+5x | | 4x^2+14x+12=0 | | 6x+10+7x+15x+2=180 | | 135(x+5)=154x | | n+37=48 | | k-8=-32 | | 3x-2(k-x-1)=5x-4k | | n+39=55 | | 5(x+2)-3(x+5)=29 | | -66=-2(1+5r)-4 | | n-10=16 | | 2+1/2(a-1)=-1 | | -2.06+18=-10.84 | | 150=5(1-5a)-5 | | -65=5(3n-4) | | -70=2-4(5v+3) | | x-6y=14 | | 2x^2y+30xy-4y= | | 5x(4x-6)=0 | | x-z=my+a | | -5(1+2x)=-65 | | X^2-6x=-10 | | y^5=2-x-x^6 | | 11x^2+21+10=0 | | 72=-6(3+3x) | | 8x+20=160 | | 2n+1-1=-4 | | 1+6x-6=7 | | n+19=22 | | -144x^2+225=0 | | 14=n-1-4n |

Equations solver categories