-x^2-5x=-5

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


Simplifying
-1x2 + -5x = -5

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

Solving
-5x + -1x2 = -5

Solving for variable 'x'.

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

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

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

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

Move the constant term to the right:

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

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

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

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

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 = 5 + 6.25

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

Combine like terms: 5 + 6.25 = 11.25
6.25 + 5x + x2 = 11.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 11.25

Calculate the square root of the right side: 3.354101966

Break this problem into two subproblems by setting 
(x + 2.5) equal to 3.354101966 and -3.354101966.

Subproblem 1

x + 2.5 = 3.354101966 Simplifying x + 2.5 = 3.354101966 Reorder the terms: 2.5 + x = 3.354101966 Solving 2.5 + x = 3.354101966 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 = 3.354101966 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 3.354101966 + -2.5 x = 3.354101966 + -2.5 Combine like terms: 3.354101966 + -2.5 = 0.854101966 x = 0.854101966 Simplifying x = 0.854101966

Subproblem 2

x + 2.5 = -3.354101966 Simplifying x + 2.5 = -3.354101966 Reorder the terms: 2.5 + x = -3.354101966 Solving 2.5 + x = -3.354101966 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 = -3.354101966 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -3.354101966 + -2.5 x = -3.354101966 + -2.5 Combine like terms: -3.354101966 + -2.5 = -5.854101966 x = -5.854101966 Simplifying x = -5.854101966

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.854101966, -5.854101966}

See similar equations:

| -t+5=1t-19 | | 2x(x-4)(x+3)=0 | | -5-11p+23p-p+4= | | 4k+4k-25= | | 5.8(10x)=2 | | 3.1=-5.9+x | | 4p+7(1.5)=489.85 | | 4y+y+1=7[y-1] | | 2(-6k+1)=-3k-4 | | 12x+3x=45 | | 14.00x=35.00 | | 8(3-k)+2(k+1)=-10 | | 14a-5b+3a-b-3= | | 14.00x=105.00 | | 585+.13*500= | | 0.375(x-4)=1.75-0.625x | | 4x-14=3x+12 | | 3n+3n+3n+12n+12n-36n= | | Y=r[bx(-c)]+[a(-d)] | | 3.3*2n=10n | | y=x+y^2 | | M+35=(-62) | | -10-29x=-18x+91 | | 12(2x-5)=3(8x+7) | | 17x=13x | | -4(1+3k)=31-7k | | 4+12n=-6n-14 | | 6+2n-4=5n+3-2n | | 13xy^2+8xy^2= | | 2+3(p+7)=13 | | g(x)=(4x^2-7x-3)(2x^2-8) | | 4x+4x-12xy+9y+9y= |

Equations solver categories