(x+40)(x-40)=180x

Simple and best practice solution for (x+40)(x-40)=180x 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+40)(x-40)=180x equation:


Simplifying
(x + 40)(x + -40) = 180x

Reorder the terms:
(40 + x)(x + -40) = 180x

Reorder the terms:
(40 + x)(-40 + x) = 180x

Multiply (40 + x) * (-40 + x)
(40(-40 + x) + x(-40 + x)) = 180x
((-40 * 40 + x * 40) + x(-40 + x)) = 180x
((-1600 + 40x) + x(-40 + x)) = 180x
(-1600 + 40x + (-40 * x + x * x)) = 180x
(-1600 + 40x + (-40x + x2)) = 180x

Combine like terms: 40x + -40x = 0
(-1600 + 0 + x2) = 180x
(-1600 + x2) = 180x

Solving
-1600 + x2 = 180x

Solving for variable 'x'.

Reorder the terms:
-1600 + -180x + x2 = 180x + -180x

Combine like terms: 180x + -180x = 0
-1600 + -180x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '1600' to each side of the equation.
-1600 + -180x + 1600 + x2 = 0 + 1600

Reorder the terms:
-1600 + 1600 + -180x + x2 = 0 + 1600

Combine like terms: -1600 + 1600 = 0
0 + -180x + x2 = 0 + 1600
-180x + x2 = 0 + 1600

Combine like terms: 0 + 1600 = 1600
-180x + x2 = 1600

The x term is -180x.  Take half its coefficient (-90).
Square it (8100) and add it to both sides.

Add '8100' to each side of the equation.
-180x + 8100 + x2 = 1600 + 8100

Reorder the terms:
8100 + -180x + x2 = 1600 + 8100

Combine like terms: 1600 + 8100 = 9700
8100 + -180x + x2 = 9700

Factor a perfect square on the left side:
(x + -90)(x + -90) = 9700

Calculate the square root of the right side: 98.488578018

Break this problem into two subproblems by setting 
(x + -90) equal to 98.488578018 and -98.488578018.

Subproblem 1

x + -90 = 98.488578018 Simplifying x + -90 = 98.488578018 Reorder the terms: -90 + x = 98.488578018 Solving -90 + x = 98.488578018 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '90' to each side of the equation. -90 + 90 + x = 98.488578018 + 90 Combine like terms: -90 + 90 = 0 0 + x = 98.488578018 + 90 x = 98.488578018 + 90 Combine like terms: 98.488578018 + 90 = 188.488578018 x = 188.488578018 Simplifying x = 188.488578018

Subproblem 2

x + -90 = -98.488578018 Simplifying x + -90 = -98.488578018 Reorder the terms: -90 + x = -98.488578018 Solving -90 + x = -98.488578018 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '90' to each side of the equation. -90 + 90 + x = -98.488578018 + 90 Combine like terms: -90 + 90 = 0 0 + x = -98.488578018 + 90 x = -98.488578018 + 90 Combine like terms: -98.488578018 + 90 = -8.488578018 x = -8.488578018 Simplifying x = -8.488578018

Solution

The solution to the problem is based on the solutions from the subproblems. x = {188.488578018, -8.488578018}

See similar equations:

| 7x-11=94+11 | | 3(p+4)=6 | | 0=4x^2+28x+49 | | v+3/5=61/2 | | 4(3+3x)-5=31 | | x-0=9 | | b/5=8 | | -22+x=x+21 | | -3(x+7)+2=-19 | | X+(4+x)=28 | | 13-5k=15 | | -4a=36 | | 3+2w=-5 | | (3+x)(3x-12)= | | 60/-3 | | -5x+4=-4(2x+2) | | 10+4x=5(x-6) | | s+71=-16 | | 21/3c=21/10 | | 1-13=1z/3 | | 2(y^2-66)=-13y | | 90/x-90/x-5=-1/4 | | (X+30)/2=63 | | 0=263t-16t^2 | | 3.2p+4=2p+8 | | (u-3)=2u^2+3u+29 | | .40x+.20(20)=.20(114) | | 3x+14=-40 | | 9x=10x+16 | | -16-4x=0 | | 5x+3/7+1=-4x/5 | | -5/11h=-5/9 |

Equations solver categories