(x-3)(x-5)=64

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Solution for (x-3)(x-5)=64 equation:


Simplifying
(x + -3)(x + -5) = 64

Reorder the terms:
(-3 + x)(x + -5) = 64

Reorder the terms:
(-3 + x)(-5 + x) = 64

Multiply (-3 + x) * (-5 + x)
(-3(-5 + x) + x(-5 + x)) = 64
((-5 * -3 + x * -3) + x(-5 + x)) = 64
((15 + -3x) + x(-5 + x)) = 64
(15 + -3x + (-5 * x + x * x)) = 64
(15 + -3x + (-5x + x2)) = 64

Combine like terms: -3x + -5x = -8x
(15 + -8x + x2) = 64

Solving
15 + -8x + x2 = 64

Solving for variable 'x'.

Reorder the terms:
15 + -64 + -8x + x2 = 64 + -64

Combine like terms: 15 + -64 = -49
-49 + -8x + x2 = 64 + -64

Combine like terms: 64 + -64 = 0
-49 + -8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '49' to each side of the equation.
-49 + -8x + 49 + x2 = 0 + 49

Reorder the terms:
-49 + 49 + -8x + x2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + -8x + x2 = 0 + 49
-8x + x2 = 0 + 49

Combine like terms: 0 + 49 = 49
-8x + x2 = 49

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 49 + 16

Reorder the terms:
16 + -8x + x2 = 49 + 16

Combine like terms: 49 + 16 = 65
16 + -8x + x2 = 65

Factor a perfect square on the left side:
(x + -4)(x + -4) = 65

Calculate the square root of the right side: 8.062257748

Break this problem into two subproblems by setting 
(x + -4) equal to 8.062257748 and -8.062257748.

Subproblem 1

x + -4 = 8.062257748 Simplifying x + -4 = 8.062257748 Reorder the terms: -4 + x = 8.062257748 Solving -4 + x = 8.062257748 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 8.062257748 + 4 Combine like terms: -4 + 4 = 0 0 + x = 8.062257748 + 4 x = 8.062257748 + 4 Combine like terms: 8.062257748 + 4 = 12.062257748 x = 12.062257748 Simplifying x = 12.062257748

Subproblem 2

x + -4 = -8.062257748 Simplifying x + -4 = -8.062257748 Reorder the terms: -4 + x = -8.062257748 Solving -4 + x = -8.062257748 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -8.062257748 + 4 Combine like terms: -4 + 4 = 0 0 + x = -8.062257748 + 4 x = -8.062257748 + 4 Combine like terms: -8.062257748 + 4 = -4.062257748 x = -4.062257748 Simplifying x = -4.062257748

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.062257748, -4.062257748}

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