(2x-3)(x+2)=56

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Solution for (2x-3)(x+2)=56 equation:


Simplifying
(2x + -3)(x + 2) = 56

Reorder the terms:
(-3 + 2x)(x + 2) = 56

Reorder the terms:
(-3 + 2x)(2 + x) = 56

Multiply (-3 + 2x) * (2 + x)
(-3(2 + x) + 2x * (2 + x)) = 56
((2 * -3 + x * -3) + 2x * (2 + x)) = 56
((-6 + -3x) + 2x * (2 + x)) = 56
(-6 + -3x + (2 * 2x + x * 2x)) = 56
(-6 + -3x + (4x + 2x2)) = 56

Combine like terms: -3x + 4x = 1x
(-6 + 1x + 2x2) = 56

Solving
-6 + 1x + 2x2 = 56

Solving for variable 'x'.

Reorder the terms:
-6 + -56 + 1x + 2x2 = 56 + -56

Combine like terms: -6 + -56 = -62
-62 + 1x + 2x2 = 56 + -56

Combine like terms: 56 + -56 = 0
-62 + 1x + 2x2 = 0

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

Divide each side by '2'.
-31 + 0.5x + x2 = 0

Move the constant term to the right:

Add '31' to each side of the equation.
-31 + 0.5x + 31 + x2 = 0 + 31

Reorder the terms:
-31 + 31 + 0.5x + x2 = 0 + 31

Combine like terms: -31 + 31 = 0
0 + 0.5x + x2 = 0 + 31
0.5x + x2 = 0 + 31

Combine like terms: 0 + 31 = 31
0.5x + x2 = 31

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = 31 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 31 + 0.0625

Combine like terms: 31 + 0.0625 = 31.0625
0.0625 + 0.5x + x2 = 31.0625

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 31.0625

Calculate the square root of the right side: 5.573374202

Break this problem into two subproblems by setting 
(x + 0.25) equal to 5.573374202 and -5.573374202.

Subproblem 1

x + 0.25 = 5.573374202 Simplifying x + 0.25 = 5.573374202 Reorder the terms: 0.25 + x = 5.573374202 Solving 0.25 + x = 5.573374202 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = 5.573374202 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 5.573374202 + -0.25 x = 5.573374202 + -0.25 Combine like terms: 5.573374202 + -0.25 = 5.323374202 x = 5.323374202 Simplifying x = 5.323374202

Subproblem 2

x + 0.25 = -5.573374202 Simplifying x + 0.25 = -5.573374202 Reorder the terms: 0.25 + x = -5.573374202 Solving 0.25 + x = -5.573374202 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = -5.573374202 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -5.573374202 + -0.25 x = -5.573374202 + -0.25 Combine like terms: -5.573374202 + -0.25 = -5.823374202 x = -5.823374202 Simplifying x = -5.823374202

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.323374202, -5.823374202}

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