x*x-15x=-56

Simple and best practice solution for x*x-15x=-56 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-15x=-56 equation:


Simplifying
x * x + -15x = -56

Multiply x * x
x2 + -15x = -56

Reorder the terms:
-15x + x2 = -56

Solving
-15x + x2 = -56

Solving for variable 'x'.

Reorder the terms:
56 + -15x + x2 = -56 + 56

Combine like terms: -56 + 56 = 0
56 + -15x + x2 = 0

Factor a trinomial.
(7 + -1x)(8 + -1x) = 0

Subproblem 1

Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Subproblem 2

Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8

Solution

x = {7, 8}

See similar equations:

| 3x+9=2x+13 | | -3(5z+24)+2=2(3-2z)-4 | | (7x-4z)+1(-5w+z)= | | 7x+6+5x=-66 | | 3x*x+2x=8 | | 8(b-2)= | | 6x+2(x+6)=28 | | 10x-13=12x-27 | | 9x-36=3x | | -14=2x-6x+6 | | 4(3x-5)+20= | | 6(A+3)= | | 2x*x-7x-15=0 | | h=-16t^2+48t+64 | | -10x-45+2x=99 | | -6x-2(6x-17)=-74 | | 40=4x+2x+4 | | 4(b-y)=7b | | -6x-2(6x-17)=74 | | (5h-3)+1(6h+4)= | | -100+x+8x=44 | | -4=7x+4x-4 | | x+0.04x=6 | | 6-2x+3x=10 | | x*x+11x+24=0 | | 5(c-3)=6(c-8) | | -119-3x+11x=49 | | 4x-10-7x=17 | | n(6+n)= | | -9x-54+4x=21 | | 0.42w-11=0.57w | | (0.9x^4+0.8x^2-3.8)-(4.34x^4+3.2x-5.2)= |

Equations solver categories