2x^2+10x-100=x^2+9x+60

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Solution for 2x^2+10x-100=x^2+9x+60 equation:


Simplifying
2x2 + 10x + -100 = x2 + 9x + 60

Reorder the terms:
-100 + 10x + 2x2 = x2 + 9x + 60

Reorder the terms:
-100 + 10x + 2x2 = 60 + 9x + x2

Solving
-100 + 10x + 2x2 = 60 + 9x + x2

Solving for variable 'x'.

Reorder the terms:
-100 + -60 + 10x + -9x + 2x2 + -1x2 = 60 + 9x + x2 + -60 + -9x + -1x2

Combine like terms: -100 + -60 = -160
-160 + 10x + -9x + 2x2 + -1x2 = 60 + 9x + x2 + -60 + -9x + -1x2

Combine like terms: 10x + -9x = 1x
-160 + 1x + 2x2 + -1x2 = 60 + 9x + x2 + -60 + -9x + -1x2

Combine like terms: 2x2 + -1x2 = 1x2
-160 + 1x + 1x2 = 60 + 9x + x2 + -60 + -9x + -1x2

Reorder the terms:
-160 + 1x + 1x2 = 60 + -60 + 9x + -9x + x2 + -1x2

Combine like terms: 60 + -60 = 0
-160 + 1x + 1x2 = 0 + 9x + -9x + x2 + -1x2
-160 + 1x + 1x2 = 9x + -9x + x2 + -1x2

Combine like terms: 9x + -9x = 0
-160 + 1x + 1x2 = 0 + x2 + -1x2
-160 + 1x + 1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-160 + 1x + 1x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '160' to each side of the equation.
-160 + 1x + 160 + x2 = 0 + 160

Reorder the terms:
-160 + 160 + 1x + x2 = 0 + 160

Combine like terms: -160 + 160 = 0
0 + 1x + x2 = 0 + 160
1x + x2 = 0 + 160

Combine like terms: 0 + 160 = 160
1x + x2 = 160

The x term is 1x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 160 + 0.25

Reorder the terms:
0.25 + x + x2 = 160 + 0.25

Combine like terms: 160 + 0.25 = 160.25
0.25 + x + x2 = 160.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 160.25

Calculate the square root of the right side: 12.658988901

Break this problem into two subproblems by setting 
(x + 0.5) equal to 12.658988901 and -12.658988901.

Subproblem 1

x + 0.5 = 12.658988901 Simplifying x + 0.5 = 12.658988901 Reorder the terms: 0.5 + x = 12.658988901 Solving 0.5 + x = 12.658988901 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 12.658988901 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 12.658988901 + -0.5 x = 12.658988901 + -0.5 Combine like terms: 12.658988901 + -0.5 = 12.158988901 x = 12.158988901 Simplifying x = 12.158988901

Subproblem 2

x + 0.5 = -12.658988901 Simplifying x + 0.5 = -12.658988901 Reorder the terms: 0.5 + x = -12.658988901 Solving 0.5 + x = -12.658988901 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -12.658988901 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -12.658988901 + -0.5 x = -12.658988901 + -0.5 Combine like terms: -12.658988901 + -0.5 = -13.158988901 x = -13.158988901 Simplifying x = -13.158988901

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.158988901, -13.158988901}

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