(x-2)(x+5)=9x+10

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Solution for (x-2)(x+5)=9x+10 equation:


Simplifying
(x + -2)(x + 5) = 9x + 10

Reorder the terms:
(-2 + x)(x + 5) = 9x + 10

Reorder the terms:
(-2 + x)(5 + x) = 9x + 10

Multiply (-2 + x) * (5 + x)
(-2(5 + x) + x(5 + x)) = 9x + 10
((5 * -2 + x * -2) + x(5 + x)) = 9x + 10
((-10 + -2x) + x(5 + x)) = 9x + 10
(-10 + -2x + (5 * x + x * x)) = 9x + 10
(-10 + -2x + (5x + x2)) = 9x + 10

Combine like terms: -2x + 5x = 3x
(-10 + 3x + x2) = 9x + 10

Reorder the terms:
-10 + 3x + x2 = 10 + 9x

Solving
-10 + 3x + x2 = 10 + 9x

Solving for variable 'x'.

Reorder the terms:
-10 + -10 + 3x + -9x + x2 = 10 + 9x + -10 + -9x

Combine like terms: -10 + -10 = -20
-20 + 3x + -9x + x2 = 10 + 9x + -10 + -9x

Combine like terms: 3x + -9x = -6x
-20 + -6x + x2 = 10 + 9x + -10 + -9x

Reorder the terms:
-20 + -6x + x2 = 10 + -10 + 9x + -9x

Combine like terms: 10 + -10 = 0
-20 + -6x + x2 = 0 + 9x + -9x
-20 + -6x + x2 = 9x + -9x

Combine like terms: 9x + -9x = 0
-20 + -6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '20' to each side of the equation.
-20 + -6x + 20 + x2 = 0 + 20

Reorder the terms:
-20 + 20 + -6x + x2 = 0 + 20

Combine like terms: -20 + 20 = 0
0 + -6x + x2 = 0 + 20
-6x + x2 = 0 + 20

Combine like terms: 0 + 20 = 20
-6x + x2 = 20

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = 20 + 9

Reorder the terms:
9 + -6x + x2 = 20 + 9

Combine like terms: 20 + 9 = 29
9 + -6x + x2 = 29

Factor a perfect square on the left side:
(x + -3)(x + -3) = 29

Calculate the square root of the right side: 5.385164807

Break this problem into two subproblems by setting 
(x + -3) equal to 5.385164807 and -5.385164807.

Subproblem 1

x + -3 = 5.385164807 Simplifying x + -3 = 5.385164807 Reorder the terms: -3 + x = 5.385164807 Solving -3 + x = 5.385164807 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 5.385164807 + 3 Combine like terms: -3 + 3 = 0 0 + x = 5.385164807 + 3 x = 5.385164807 + 3 Combine like terms: 5.385164807 + 3 = 8.385164807 x = 8.385164807 Simplifying x = 8.385164807

Subproblem 2

x + -3 = -5.385164807 Simplifying x + -3 = -5.385164807 Reorder the terms: -3 + x = -5.385164807 Solving -3 + x = -5.385164807 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -5.385164807 + 3 Combine like terms: -3 + 3 = 0 0 + x = -5.385164807 + 3 x = -5.385164807 + 3 Combine like terms: -5.385164807 + 3 = -2.385164807 x = -2.385164807 Simplifying x = -2.385164807

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.385164807, -2.385164807}

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