-16x^2+14x+13.5=5

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Solution for -16x^2+14x+13.5=5 equation:


Simplifying
-16x2 + 14x + 13.5 = 5

Reorder the terms:
13.5 + 14x + -16x2 = 5

Solving
13.5 + 14x + -16x2 = 5

Solving for variable 'x'.

Reorder the terms:
13.5 + -5 + 14x + -16x2 = 5 + -5

Combine like terms: 13.5 + -5 = 8.5
8.5 + 14x + -16x2 = 5 + -5

Combine like terms: 5 + -5 = 0
8.5 + 14x + -16x2 = 0

Begin completing the square.  Divide all terms by
-16 the coefficient of the squared term: 

Divide each side by '-16'.
-0.53125 + -0.875x + x2 = 0

Move the constant term to the right:

Add '0.53125' to each side of the equation.
-0.53125 + -0.875x + 0.53125 + x2 = 0 + 0.53125

Reorder the terms:
-0.53125 + 0.53125 + -0.875x + x2 = 0 + 0.53125

Combine like terms: -0.53125 + 0.53125 = 0.00000
0.00000 + -0.875x + x2 = 0 + 0.53125
-0.875x + x2 = 0 + 0.53125

Combine like terms: 0 + 0.53125 = 0.53125
-0.875x + x2 = 0.53125

The x term is -0.875x.  Take half its coefficient (-0.4375).
Square it (0.19140625) and add it to both sides.

Add '0.19140625' to each side of the equation.
-0.875x + 0.19140625 + x2 = 0.53125 + 0.19140625

Reorder the terms:
0.19140625 + -0.875x + x2 = 0.53125 + 0.19140625

Combine like terms: 0.53125 + 0.19140625 = 0.72265625
0.19140625 + -0.875x + x2 = 0.72265625

Factor a perfect square on the left side:
(x + -0.4375)(x + -0.4375) = 0.72265625

Calculate the square root of the right side: 0.850091907

Break this problem into two subproblems by setting 
(x + -0.4375) equal to 0.850091907 and -0.850091907.

Subproblem 1

x + -0.4375 = 0.850091907 Simplifying x + -0.4375 = 0.850091907 Reorder the terms: -0.4375 + x = 0.850091907 Solving -0.4375 + x = 0.850091907 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4375' to each side of the equation. -0.4375 + 0.4375 + x = 0.850091907 + 0.4375 Combine like terms: -0.4375 + 0.4375 = 0.0000 0.0000 + x = 0.850091907 + 0.4375 x = 0.850091907 + 0.4375 Combine like terms: 0.850091907 + 0.4375 = 1.287591907 x = 1.287591907 Simplifying x = 1.287591907

Subproblem 2

x + -0.4375 = -0.850091907 Simplifying x + -0.4375 = -0.850091907 Reorder the terms: -0.4375 + x = -0.850091907 Solving -0.4375 + x = -0.850091907 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4375' to each side of the equation. -0.4375 + 0.4375 + x = -0.850091907 + 0.4375 Combine like terms: -0.4375 + 0.4375 = 0.0000 0.0000 + x = -0.850091907 + 0.4375 x = -0.850091907 + 0.4375 Combine like terms: -0.850091907 + 0.4375 = -0.412591907 x = -0.412591907 Simplifying x = -0.412591907

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.287591907, -0.412591907}

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