x(x)-10x=40

Simple and best practice solution for x(x)-10x=40 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)-10x=40 equation:


Simplifying
x(x) + -10x = 40

Multiply x * x
x2 + -10x = 40

Reorder the terms:
-10x + x2 = 40

Solving
-10x + x2 = 40

Solving for variable 'x'.

Reorder the terms:
-40 + -10x + x2 = 40 + -40

Combine like terms: 40 + -40 = 0
-40 + -10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '40' to each side of the equation.
-40 + -10x + 40 + x2 = 0 + 40

Reorder the terms:
-40 + 40 + -10x + x2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + -10x + x2 = 0 + 40
-10x + x2 = 0 + 40

Combine like terms: 0 + 40 = 40
-10x + x2 = 40

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = 40 + 25

Reorder the terms:
25 + -10x + x2 = 40 + 25

Combine like terms: 40 + 25 = 65
25 + -10x + x2 = 65

Factor a perfect square on the left side:
(x + -5)(x + -5) = 65

Calculate the square root of the right side: 8.062257748

Break this problem into two subproblems by setting 
(x + -5) equal to 8.062257748 and -8.062257748.

Subproblem 1

x + -5 = 8.062257748 Simplifying x + -5 = 8.062257748 Reorder the terms: -5 + x = 8.062257748 Solving -5 + x = 8.062257748 Solving for variable 'x'. 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 = 8.062257748 + 5 Combine like terms: -5 + 5 = 0 0 + x = 8.062257748 + 5 x = 8.062257748 + 5 Combine like terms: 8.062257748 + 5 = 13.062257748 x = 13.062257748 Simplifying x = 13.062257748

Subproblem 2

x + -5 = -8.062257748 Simplifying x + -5 = -8.062257748 Reorder the terms: -5 + x = -8.062257748 Solving -5 + x = -8.062257748 Solving for variable 'x'. 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 = -8.062257748 + 5 Combine like terms: -5 + 5 = 0 0 + x = -8.062257748 + 5 x = -8.062257748 + 5 Combine like terms: -8.062257748 + 5 = -3.062257748 x = -3.062257748 Simplifying x = -3.062257748

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.062257748, -3.062257748}

See similar equations:

| -16+x^2=0 | | 8-3r=3r+2 | | 5m^2-7m-34=0 | | 8.3=logx | | 12-2n=3n+2 | | 8x^2+1=12x | | 5x+13+151+2x-12=180 | | 42=2x-14 | | -2a-3=a-12 | | 108=.5(x+6)(x) | | 4x+6(3x+16)=190 | | 16t^2-76t+20=0 | | 2x^2+4x+x=0 | | 9(Y-4)=-10(Y+2.33) | | ln(100)=3.5ln(x) | | 5y-5+135=180 | | 144=0.8(220-a) | | 4(f+4)=20 | | 5+6x=59 | | 7+11m=7m-1 | | =1a+13x-4x-11 | | =-2p-3q-6p+5q | | 3(2x-1)=7(x+3) | | y=160000(1+15) | | x^2-2z=0 | | -4=k | | =-1-x+25+7x | | 48=.4x-8 | | -6-2-1= | | 5x-19+13x+3=180 | | 4-6x=-32 | | 3x+4(5x+6)=162 |

Equations solver categories