(x^2)-(16x)+40=0

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Solution for (x^2)-(16x)+40=0 equation:


Simplifying
(x2) + -1(16x) + 40 = 0
x2 + -1(16x) + 40 = 0

Remove parenthesis around (16x)
x2 + -1 * 16x + 40 = 0

Multiply -1 * 16
x2 + -16x + 40 = 0

Reorder the terms:
40 + -16x + x2 = 0

Solving
40 + -16x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-40' to each side of the equation.
40 + -16x + -40 + x2 = 0 + -40

Reorder the terms:
40 + -40 + -16x + x2 = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -16x + x2 = 0 + -40
-16x + x2 = 0 + -40

Combine like terms: 0 + -40 = -40
-16x + x2 = -40

The x term is -16x.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16x + 64 + x2 = -40 + 64

Reorder the terms:
64 + -16x + x2 = -40 + 64

Combine like terms: -40 + 64 = 24
64 + -16x + x2 = 24

Factor a perfect square on the left side:
(x + -8)(x + -8) = 24

Calculate the square root of the right side: 4.898979486

Break this problem into two subproblems by setting 
(x + -8) equal to 4.898979486 and -4.898979486.

Subproblem 1

x + -8 = 4.898979486 Simplifying x + -8 = 4.898979486 Reorder the terms: -8 + x = 4.898979486 Solving -8 + x = 4.898979486 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = 4.898979486 + 8 Combine like terms: -8 + 8 = 0 0 + x = 4.898979486 + 8 x = 4.898979486 + 8 Combine like terms: 4.898979486 + 8 = 12.898979486 x = 12.898979486 Simplifying x = 12.898979486

Subproblem 2

x + -8 = -4.898979486 Simplifying x + -8 = -4.898979486 Reorder the terms: -8 + x = -4.898979486 Solving -8 + x = -4.898979486 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = -4.898979486 + 8 Combine like terms: -8 + 8 = 0 0 + x = -4.898979486 + 8 x = -4.898979486 + 8 Combine like terms: -4.898979486 + 8 = 3.101020514 x = 3.101020514 Simplifying x = 3.101020514

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.898979486, 3.101020514}

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