x*x-5x=180

Simple and best practice solution for x*x-5x=180 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-5x=180 equation:


Simplifying
x * x + -5x = 180

Multiply x * x
x2 + -5x = 180

Reorder the terms:
-5x + x2 = 180

Solving
-5x + x2 = 180

Solving for variable 'x'.

Reorder the terms:
-180 + -5x + x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-180 + -5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '180' to each side of the equation.
-180 + -5x + 180 + x2 = 0 + 180

Reorder the terms:
-180 + 180 + -5x + x2 = 0 + 180

Combine like terms: -180 + 180 = 0
0 + -5x + x2 = 0 + 180
-5x + x2 = 0 + 180

Combine like terms: 0 + 180 = 180
-5x + x2 = 180

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 = 180 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 180 + 6.25

Combine like terms: 180 + 6.25 = 186.25
6.25 + -5x + x2 = 186.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 186.25

Calculate the square root of the right side: 13.647344064

Break this problem into two subproblems by setting 
(x + -2.5) equal to 13.647344064 and -13.647344064.

Subproblem 1

x + -2.5 = 13.647344064 Simplifying x + -2.5 = 13.647344064 Reorder the terms: -2.5 + x = 13.647344064 Solving -2.5 + x = 13.647344064 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 = 13.647344064 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 13.647344064 + 2.5 x = 13.647344064 + 2.5 Combine like terms: 13.647344064 + 2.5 = 16.147344064 x = 16.147344064 Simplifying x = 16.147344064

Subproblem 2

x + -2.5 = -13.647344064 Simplifying x + -2.5 = -13.647344064 Reorder the terms: -2.5 + x = -13.647344064 Solving -2.5 + x = -13.647344064 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 = -13.647344064 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -13.647344064 + 2.5 x = -13.647344064 + 2.5 Combine like terms: -13.647344064 + 2.5 = -11.147344064 x = -11.147344064 Simplifying x = -11.147344064

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.147344064, -11.147344064}

See similar equations:

| -3x*4=-19 | | 1/2x=-30 | | 4c-2= | | 2s=4c+4t | | 5k=54 | | -13x+5-4(x-1)=-4x-(12x-4)+4 | | 1.05x=22 | | .05x=22 | | -8y+13=-11 | | x+5=3i | | 2*(b+56.8)=180.4 | | b^2-b+43=0 | | 180=6x+13+3x-4 | | -23p-6(3-5p)=2(p-4)-10 | | (3/4.5)=b^-1 | | 22x-4-14x=2(4x-3)+2 | | .5n+60=1.3n-60 | | -6x+7-6(x-1)=-6x-(5x-4)+6 | | 84-49t+7t^2=0 | | -5x^2(3x^2-3x-7)= | | ln(6)+4x-9-ln(9)=1 | | 8x+14x-56=4 | | 5.9q-5.8-5.4q=-0.5q-5.2 | | 15x-4+y=180 | | -[6z-(14z+7)]=7+(7z+2) | | 3xy=3x | | 7.32+22=2.1t-22.2 | | -20(4x-1)=15 | | 12/2x2^3 | | 7x+6=6x+2 | | -2.5y/(-4.8) | | 5n=4n+48 |

Equations solver categories