2x(x-5)=3(x+2)+5

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Solution for 2x(x-5)=3(x+2)+5 equation:


Simplifying
2x(x + -5) = 3(x + 2) + 5

Reorder the terms:
2x(-5 + x) = 3(x + 2) + 5
(-5 * 2x + x * 2x) = 3(x + 2) + 5
(-10x + 2x2) = 3(x + 2) + 5

Reorder the terms:
-10x + 2x2 = 3(2 + x) + 5
-10x + 2x2 = (2 * 3 + x * 3) + 5
-10x + 2x2 = (6 + 3x) + 5

Reorder the terms:
-10x + 2x2 = 6 + 5 + 3x

Combine like terms: 6 + 5 = 11
-10x + 2x2 = 11 + 3x

Solving
-10x + 2x2 = 11 + 3x

Solving for variable 'x'.

Reorder the terms:
-11 + -10x + -3x + 2x2 = 11 + 3x + -11 + -3x

Combine like terms: -10x + -3x = -13x
-11 + -13x + 2x2 = 11 + 3x + -11 + -3x

Reorder the terms:
-11 + -13x + 2x2 = 11 + -11 + 3x + -3x

Combine like terms: 11 + -11 = 0
-11 + -13x + 2x2 = 0 + 3x + -3x
-11 + -13x + 2x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
-11 + -13x + 2x2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-5.5 + -6.5x + x2 = 0

Move the constant term to the right:

Add '5.5' to each side of the equation.
-5.5 + -6.5x + 5.5 + x2 = 0 + 5.5

Reorder the terms:
-5.5 + 5.5 + -6.5x + x2 = 0 + 5.5

Combine like terms: -5.5 + 5.5 = 0.0
0.0 + -6.5x + x2 = 0 + 5.5
-6.5x + x2 = 0 + 5.5

Combine like terms: 0 + 5.5 = 5.5
-6.5x + x2 = 5.5

The x term is -6.5x.  Take half its coefficient (-3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
-6.5x + 10.5625 + x2 = 5.5 + 10.5625

Reorder the terms:
10.5625 + -6.5x + x2 = 5.5 + 10.5625

Combine like terms: 5.5 + 10.5625 = 16.0625
10.5625 + -6.5x + x2 = 16.0625

Factor a perfect square on the left side:
(x + -3.25)(x + -3.25) = 16.0625

Calculate the square root of the right side: 4.007804885

Break this problem into two subproblems by setting 
(x + -3.25) equal to 4.007804885 and -4.007804885.

Subproblem 1

x + -3.25 = 4.007804885 Simplifying x + -3.25 = 4.007804885 Reorder the terms: -3.25 + x = 4.007804885 Solving -3.25 + x = 4.007804885 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + x = 4.007804885 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + x = 4.007804885 + 3.25 x = 4.007804885 + 3.25 Combine like terms: 4.007804885 + 3.25 = 7.257804885 x = 7.257804885 Simplifying x = 7.257804885

Subproblem 2

x + -3.25 = -4.007804885 Simplifying x + -3.25 = -4.007804885 Reorder the terms: -3.25 + x = -4.007804885 Solving -3.25 + x = -4.007804885 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + x = -4.007804885 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + x = -4.007804885 + 3.25 x = -4.007804885 + 3.25 Combine like terms: -4.007804885 + 3.25 = -0.757804885 x = -0.757804885 Simplifying x = -0.757804885

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.257804885, -0.757804885}

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