15=x(2+x)

Simple and best practice solution for 15=x(2+x) 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 15=x(2+x) equation:


Simplifying
15 = x(2 + x)
15 = (2 * x + x * x)
15 = (2x + x2)

Solving
15 = 2x + x2

Solving for variable 'x'.

Reorder the terms:
15 + -2x + -1x2 = 2x + -2x + x2 + -1x2

Combine like terms: 2x + -2x = 0
15 + -2x + -1x2 = 0 + x2 + -1x2
15 + -2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
15 + -2x + -1x2 = 0

Factor a trinomial.
(3 + -1x)(5 + x) = 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 '(5 + x)' equal to zero and attempt to solve: Simplifying 5 + x = 0 Solving 5 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + x = 0 + -5 x = 0 + -5 Combine like terms: 0 + -5 = -5 x = -5 Simplifying x = -5

Solution

x = {3, -5}

See similar equations:

| 4n/5-6/13=74/65 | | 9x/2-3=42 | | X+.7=1-2x | | 30j-53=847 | | 16(b+1)=416 | | 3(4b)-8-2d=22 | | -2h^2-14h-30=0 | | 3x^2+2x-750=0 | | 0.1+2.76= | | 659=6p-205 | | 0.8+1.12= | | 0.24+1.2= | | 266-h=105 | | -1.49+1.5= | | -x-3y+5(4)=26 | | -7.05+0.5= | | x=y+p^2 | | -2.35+0.7= | | -0.1+1.43= | | x=y+alogp | | 1.9+6.8= | | f(x)=36x^2-264x+360 | | -2.80+0.7= | | 8x-7y=20fory | | x+y+(4)=0 | | 0.2+8.4= | | 3+8m=75 | | 25=R(10) | | -3.99+(-0.4)= | | 10(b-9)-7(3b+9)= | | 0.4+3.3= | | 119-4k=47 |

Equations solver categories