2x^2-x-15=x(x+1)

Simple and best practice solution for 2x^2-x-15=x(x+1) 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 2x^2-x-15=x(x+1) equation:


Simplifying
2x2 + -1x + -15 = x(x + 1)

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

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

Solving
-15 + -1x + 2x2 = 1x + x2

Solving for variable 'x'.

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

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

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

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

Combine like terms: 1x + -1x = 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 + -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 '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 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 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Solution

x = {-3, 5}

See similar equations:

| 21,723/7 | | -8.5b=-10.5 | | -8.5=-10.4 | | (4w-3)(5+w)=0 | | p-10=30 | | 28x+25=7x-38 | | 42/3+211/12 | | 5.2m=11.96 | | 2(x-3)-5(x-7)=0 | | 4-31nx=2 | | 5/21+2/7 | | 12S=20985(3) | | 3+3x^2=4x | | 12S=20985(9) | | -4n^2=18n+18 | | c+11.4=9 | | x^2-3x-198=0 | | (4-3i)+(-2+6i)= | | 3x^2=21x+24 | | 11/5x3/2 | | 5x+7=55 | | Y=-1/4(-2)-2 | | 3/2x11/5 | | 2a-(7+3a)+(3-5a)= | | x^2+4x-2=14 | | 0.004(1/4)^n | | 40x^4-10x^2=y | | f(x)=16x^2+96x | | 2(x-3)+5(x-7)=0 | | 3/4*2/3 | | 3x+1y=407 | | x−2+x−1=4 |

Equations solver categories