(16-x)(10-x)=120

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Solution for (16-x)(10-x)=120 equation:


Simplifying
(16 + -1x)(10 + -1x) = 120

Multiply (16 + -1x) * (10 + -1x)
(16(10 + -1x) + -1x * (10 + -1x)) = 120
((10 * 16 + -1x * 16) + -1x * (10 + -1x)) = 120
((160 + -16x) + -1x * (10 + -1x)) = 120
(160 + -16x + (10 * -1x + -1x * -1x)) = 120
(160 + -16x + (-10x + 1x2)) = 120

Combine like terms: -16x + -10x = -26x
(160 + -26x + 1x2) = 120

Solving
160 + -26x + 1x2 = 120

Solving for variable 'x'.

Reorder the terms:
160 + -120 + -26x + 1x2 = 120 + -120

Combine like terms: 160 + -120 = 40
40 + -26x + 1x2 = 120 + -120

Combine like terms: 120 + -120 = 0
40 + -26x + 1x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-40' to each side of the equation.
40 + -26x + -40 + x2 = 0 + -40

Reorder the terms:
40 + -40 + -26x + x2 = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -26x + x2 = 0 + -40
-26x + x2 = 0 + -40

Combine like terms: 0 + -40 = -40
-26x + x2 = -40

The x term is -26x.  Take half its coefficient (-13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
-26x + 169 + x2 = -40 + 169

Reorder the terms:
169 + -26x + x2 = -40 + 169

Combine like terms: -40 + 169 = 129
169 + -26x + x2 = 129

Factor a perfect square on the left side:
(x + -13)(x + -13) = 129

Calculate the square root of the right side: 11.357816692

Break this problem into two subproblems by setting 
(x + -13) equal to 11.357816692 and -11.357816692.

Subproblem 1

x + -13 = 11.357816692 Simplifying x + -13 = 11.357816692 Reorder the terms: -13 + x = 11.357816692 Solving -13 + x = 11.357816692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = 11.357816692 + 13 Combine like terms: -13 + 13 = 0 0 + x = 11.357816692 + 13 x = 11.357816692 + 13 Combine like terms: 11.357816692 + 13 = 24.357816692 x = 24.357816692 Simplifying x = 24.357816692

Subproblem 2

x + -13 = -11.357816692 Simplifying x + -13 = -11.357816692 Reorder the terms: -13 + x = -11.357816692 Solving -13 + x = -11.357816692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = -11.357816692 + 13 Combine like terms: -13 + 13 = 0 0 + x = -11.357816692 + 13 x = -11.357816692 + 13 Combine like terms: -11.357816692 + 13 = 1.642183308 x = 1.642183308 Simplifying x = 1.642183308

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.357816692, 1.642183308}

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