-16x^2+72x+5=10

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Solution for -16x^2+72x+5=10 equation:


Simplifying
-16x2 + 72x + 5 = 10

Reorder the terms:
5 + 72x + -16x2 = 10

Solving
5 + 72x + -16x2 = 10

Solving for variable 'x'.

Reorder the terms:
5 + -10 + 72x + -16x2 = 10 + -10

Combine like terms: 5 + -10 = -5
-5 + 72x + -16x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-5 + 72x + -16x2 = 0

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

Divide each side by '-16'.
0.3125 + -4.5x + x2 = 0

Move the constant term to the right:

Add '-0.3125' to each side of the equation.
0.3125 + -4.5x + -0.3125 + x2 = 0 + -0.3125

Reorder the terms:
0.3125 + -0.3125 + -4.5x + x2 = 0 + -0.3125

Combine like terms: 0.3125 + -0.3125 = 0.0000
0.0000 + -4.5x + x2 = 0 + -0.3125
-4.5x + x2 = 0 + -0.3125

Combine like terms: 0 + -0.3125 = -0.3125
-4.5x + x2 = -0.3125

The x term is -4.5x.  Take half its coefficient (-2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
-4.5x + 5.0625 + x2 = -0.3125 + 5.0625

Reorder the terms:
5.0625 + -4.5x + x2 = -0.3125 + 5.0625

Combine like terms: -0.3125 + 5.0625 = 4.75
5.0625 + -4.5x + x2 = 4.75

Factor a perfect square on the left side:
(x + -2.25)(x + -2.25) = 4.75

Calculate the square root of the right side: 2.179449472

Break this problem into two subproblems by setting 
(x + -2.25) equal to 2.179449472 and -2.179449472.

Subproblem 1

x + -2.25 = 2.179449472 Simplifying x + -2.25 = 2.179449472 Reorder the terms: -2.25 + x = 2.179449472 Solving -2.25 + x = 2.179449472 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = 2.179449472 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = 2.179449472 + 2.25 x = 2.179449472 + 2.25 Combine like terms: 2.179449472 + 2.25 = 4.429449472 x = 4.429449472 Simplifying x = 4.429449472

Subproblem 2

x + -2.25 = -2.179449472 Simplifying x + -2.25 = -2.179449472 Reorder the terms: -2.25 + x = -2.179449472 Solving -2.25 + x = -2.179449472 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = -2.179449472 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = -2.179449472 + 2.25 x = -2.179449472 + 2.25 Combine like terms: -2.179449472 + 2.25 = 0.070550528 x = 0.070550528 Simplifying x = 0.070550528

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.429449472, 0.070550528}

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