(2x-5)(x+3)=14

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Solution for (2x-5)(x+3)=14 equation:


Simplifying
(2x + -5)(x + 3) = 14

Reorder the terms:
(-5 + 2x)(x + 3) = 14

Reorder the terms:
(-5 + 2x)(3 + x) = 14

Multiply (-5 + 2x) * (3 + x)
(-5(3 + x) + 2x * (3 + x)) = 14
((3 * -5 + x * -5) + 2x * (3 + x)) = 14
((-15 + -5x) + 2x * (3 + x)) = 14
(-15 + -5x + (3 * 2x + x * 2x)) = 14
(-15 + -5x + (6x + 2x2)) = 14

Combine like terms: -5x + 6x = 1x
(-15 + 1x + 2x2) = 14

Solving
-15 + 1x + 2x2 = 14

Solving for variable 'x'.

Reorder the terms:
-15 + -14 + 1x + 2x2 = 14 + -14

Combine like terms: -15 + -14 = -29
-29 + 1x + 2x2 = 14 + -14

Combine like terms: 14 + -14 = 0
-29 + 1x + 2x2 = 0

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

Divide each side by '2'.
-14.5 + 0.5x + x2 = 0

Move the constant term to the right:

Add '14.5' to each side of the equation.
-14.5 + 0.5x + 14.5 + x2 = 0 + 14.5

Reorder the terms:
-14.5 + 14.5 + 0.5x + x2 = 0 + 14.5

Combine like terms: -14.5 + 14.5 = 0.0
0.0 + 0.5x + x2 = 0 + 14.5
0.5x + x2 = 0 + 14.5

Combine like terms: 0 + 14.5 = 14.5
0.5x + x2 = 14.5

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 = 14.5 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 14.5 + 0.0625

Combine like terms: 14.5 + 0.0625 = 14.5625
0.0625 + 0.5x + x2 = 14.5625

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 14.5625

Calculate the square root of the right side: 3.816084381

Break this problem into two subproblems by setting 
(x + 0.25) equal to 3.816084381 and -3.816084381.

Subproblem 1

x + 0.25 = 3.816084381 Simplifying x + 0.25 = 3.816084381 Reorder the terms: 0.25 + x = 3.816084381 Solving 0.25 + x = 3.816084381 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 = 3.816084381 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 3.816084381 + -0.25 x = 3.816084381 + -0.25 Combine like terms: 3.816084381 + -0.25 = 3.566084381 x = 3.566084381 Simplifying x = 3.566084381

Subproblem 2

x + 0.25 = -3.816084381 Simplifying x + 0.25 = -3.816084381 Reorder the terms: 0.25 + x = -3.816084381 Solving 0.25 + x = -3.816084381 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 = -3.816084381 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -3.816084381 + -0.25 x = -3.816084381 + -0.25 Combine like terms: -3.816084381 + -0.25 = -4.066084381 x = -4.066084381 Simplifying x = -4.066084381

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.566084381, -4.066084381}

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