x(-5-x)=-2

Simple and best practice solution for x(-5-x)=-2 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(-5-x)=-2 equation:


Simplifying
x(-5 + -1x) = -2
(-5 * x + -1x * x) = -2
(-5x + -1x2) = -2

Solving
-5x + -1x2 = -2

Solving for variable 'x'.

Reorder the terms:
2 + -5x + -1x2 = -2 + 2

Combine like terms: -2 + 2 = 0
2 + -5x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-2 + 5x + x2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 5x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + 5x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 5x + x2 = 0 + 2
5x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
5x + x2 = 2

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 2 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 2 + 6.25

Combine like terms: 2 + 6.25 = 8.25
6.25 + 5x + x2 = 8.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 8.25

Calculate the square root of the right side: 2.872281323

Break this problem into two subproblems by setting 
(x + 2.5) equal to 2.872281323 and -2.872281323.

Subproblem 1

x + 2.5 = 2.872281323 Simplifying x + 2.5 = 2.872281323 Reorder the terms: 2.5 + x = 2.872281323 Solving 2.5 + x = 2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 2.872281323 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 2.872281323 + -2.5 x = 2.872281323 + -2.5 Combine like terms: 2.872281323 + -2.5 = 0.372281323 x = 0.372281323 Simplifying x = 0.372281323

Subproblem 2

x + 2.5 = -2.872281323 Simplifying x + 2.5 = -2.872281323 Reorder the terms: 2.5 + x = -2.872281323 Solving 2.5 + x = -2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -2.872281323 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -2.872281323 + -2.5 x = -2.872281323 + -2.5 Combine like terms: -2.872281323 + -2.5 = -5.372281323 x = -5.372281323 Simplifying x = -5.372281323

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.372281323, -5.372281323}

See similar equations:

| 6t+18=12 | | -2(y+4)+5y= | | 7(a+5)=89.6 | | 8x-13=4x+10 | | 6c+9c= | | 74x-(x^2)-1840=0 | | -2y(y+4)+5y= | | 11x-22=75 | | 5(x+1)=8(x-2) | | 38.31+.5x=80 | | 4.9x^2-30x+23=0 | | 10.9=7c-8 | | l=18 | | 9e-8=40.6 | | -4x-6=-3x-7 | | y^4-6x^2=4 | | 5p=28.5 | | 68+.40x+160= | | -6x-51=4x+79 | | 3(x+4)=3x+10 | | 7+7x-(-2x)+3=9x+10 | | 68+.40x= | | 66=-11t | | 24x-16x^2=8 | | 5x-14=81 | | 3x-53=-4x+38 | | 9(a+1)=90 | | 6x=19-(-11) | | 6x=19-(11) | | -16-4x=14-2x | | f(x)=-2x^2+12x+3 | | 6e-9=39 |

Equations solver categories