x^2+5x-10=9x+89

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Solution for x^2+5x-10=9x+89 equation:


Simplifying
x2 + 5x + -10 = 9x + 89

Reorder the terms:
-10 + 5x + x2 = 9x + 89

Reorder the terms:
-10 + 5x + x2 = 89 + 9x

Solving
-10 + 5x + x2 = 89 + 9x

Solving for variable 'x'.

Reorder the terms:
-10 + -89 + 5x + -9x + x2 = 89 + 9x + -89 + -9x

Combine like terms: -10 + -89 = -99
-99 + 5x + -9x + x2 = 89 + 9x + -89 + -9x

Combine like terms: 5x + -9x = -4x
-99 + -4x + x2 = 89 + 9x + -89 + -9x

Reorder the terms:
-99 + -4x + x2 = 89 + -89 + 9x + -9x

Combine like terms: 89 + -89 = 0
-99 + -4x + x2 = 0 + 9x + -9x
-99 + -4x + x2 = 9x + -9x

Combine like terms: 9x + -9x = 0
-99 + -4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '99' to each side of the equation.
-99 + -4x + 99 + x2 = 0 + 99

Reorder the terms:
-99 + 99 + -4x + x2 = 0 + 99

Combine like terms: -99 + 99 = 0
0 + -4x + x2 = 0 + 99
-4x + x2 = 0 + 99

Combine like terms: 0 + 99 = 99
-4x + x2 = 99

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 99 + 4

Reorder the terms:
4 + -4x + x2 = 99 + 4

Combine like terms: 99 + 4 = 103
4 + -4x + x2 = 103

Factor a perfect square on the left side:
(x + -2)(x + -2) = 103

Calculate the square root of the right side: 10.148891565

Break this problem into two subproblems by setting 
(x + -2) equal to 10.148891565 and -10.148891565.

Subproblem 1

x + -2 = 10.148891565 Simplifying x + -2 = 10.148891565 Reorder the terms: -2 + x = 10.148891565 Solving -2 + x = 10.148891565 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 10.148891565 + 2 Combine like terms: -2 + 2 = 0 0 + x = 10.148891565 + 2 x = 10.148891565 + 2 Combine like terms: 10.148891565 + 2 = 12.148891565 x = 12.148891565 Simplifying x = 12.148891565

Subproblem 2

x + -2 = -10.148891565 Simplifying x + -2 = -10.148891565 Reorder the terms: -2 + x = -10.148891565 Solving -2 + x = -10.148891565 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -10.148891565 + 2 Combine like terms: -2 + 2 = 0 0 + x = -10.148891565 + 2 x = -10.148891565 + 2 Combine like terms: -10.148891565 + 2 = -8.148891565 x = -8.148891565 Simplifying x = -8.148891565

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.148891565, -8.148891565}

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