16x^2-72x+79=0

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Solution for 16x^2-72x+79=0 equation:


Simplifying
16x2 + -72x + 79 = 0

Reorder the terms:
79 + -72x + 16x2 = 0

Solving
79 + -72x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
4.9375 + -4.5x + x2 = 0

Move the constant term to the right:

Add '-4.9375' to each side of the equation.
4.9375 + -4.5x + -4.9375 + x2 = 0 + -4.9375

Reorder the terms:
4.9375 + -4.9375 + -4.5x + x2 = 0 + -4.9375

Combine like terms: 4.9375 + -4.9375 = 0.0000
0.0000 + -4.5x + x2 = 0 + -4.9375
-4.5x + x2 = 0 + -4.9375

Combine like terms: 0 + -4.9375 = -4.9375
-4.5x + x2 = -4.9375

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 = -4.9375 + 5.0625

Reorder the terms:
5.0625 + -4.5x + x2 = -4.9375 + 5.0625

Combine like terms: -4.9375 + 5.0625 = 0.125
5.0625 + -4.5x + x2 = 0.125

Factor a perfect square on the left side:
(x + -2.25)(x + -2.25) = 0.125

Calculate the square root of the right side: 0.353553391

Break this problem into two subproblems by setting 
(x + -2.25) equal to 0.353553391 and -0.353553391.

Subproblem 1

x + -2.25 = 0.353553391 Simplifying x + -2.25 = 0.353553391 Reorder the terms: -2.25 + x = 0.353553391 Solving -2.25 + x = 0.353553391 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 = 0.353553391 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = 0.353553391 + 2.25 x = 0.353553391 + 2.25 Combine like terms: 0.353553391 + 2.25 = 2.603553391 x = 2.603553391 Simplifying x = 2.603553391

Subproblem 2

x + -2.25 = -0.353553391 Simplifying x + -2.25 = -0.353553391 Reorder the terms: -2.25 + x = -0.353553391 Solving -2.25 + x = -0.353553391 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 = -0.353553391 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = -0.353553391 + 2.25 x = -0.353553391 + 2.25 Combine like terms: -0.353553391 + 2.25 = 1.896446609 x = 1.896446609 Simplifying x = 1.896446609

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.603553391, 1.896446609}

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