(8-x)(6-x)=40

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Solution for (8-x)(6-x)=40 equation:


Simplifying
(8 + -1x)(6 + -1x) = 40

Multiply (8 + -1x) * (6 + -1x)
(8(6 + -1x) + -1x * (6 + -1x)) = 40
((6 * 8 + -1x * 8) + -1x * (6 + -1x)) = 40
((48 + -8x) + -1x * (6 + -1x)) = 40
(48 + -8x + (6 * -1x + -1x * -1x)) = 40
(48 + -8x + (-6x + 1x2)) = 40

Combine like terms: -8x + -6x = -14x
(48 + -14x + 1x2) = 40

Solving
48 + -14x + 1x2 = 40

Solving for variable 'x'.

Reorder the terms:
48 + -40 + -14x + 1x2 = 40 + -40

Combine like terms: 48 + -40 = 8
8 + -14x + 1x2 = 40 + -40

Combine like terms: 40 + -40 = 0
8 + -14x + 1x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + -14x + -8 + x2 = 0 + -8

Reorder the terms:
8 + -8 + -14x + x2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -14x + x2 = 0 + -8
-14x + x2 = 0 + -8

Combine like terms: 0 + -8 = -8
-14x + x2 = -8

The x term is -14x.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14x + 49 + x2 = -8 + 49

Reorder the terms:
49 + -14x + x2 = -8 + 49

Combine like terms: -8 + 49 = 41
49 + -14x + x2 = 41

Factor a perfect square on the left side:
(x + -7)(x + -7) = 41

Calculate the square root of the right side: 6.403124237

Break this problem into two subproblems by setting 
(x + -7) equal to 6.403124237 and -6.403124237.

Subproblem 1

x + -7 = 6.403124237 Simplifying x + -7 = 6.403124237 Reorder the terms: -7 + x = 6.403124237 Solving -7 + x = 6.403124237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = 6.403124237 + 7 Combine like terms: -7 + 7 = 0 0 + x = 6.403124237 + 7 x = 6.403124237 + 7 Combine like terms: 6.403124237 + 7 = 13.403124237 x = 13.403124237 Simplifying x = 13.403124237

Subproblem 2

x + -7 = -6.403124237 Simplifying x + -7 = -6.403124237 Reorder the terms: -7 + x = -6.403124237 Solving -7 + x = -6.403124237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = -6.403124237 + 7 Combine like terms: -7 + 7 = 0 0 + x = -6.403124237 + 7 x = -6.403124237 + 7 Combine like terms: -6.403124237 + 7 = 0.596875763 x = 0.596875763 Simplifying x = 0.596875763

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.403124237, 0.596875763}

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