(3x-4)(64-x)=10

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Solution for (3x-4)(64-x)=10 equation:


Simplifying
(3x + -4)(64 + -1x) = 10

Reorder the terms:
(-4 + 3x)(64 + -1x) = 10

Multiply (-4 + 3x) * (64 + -1x)
(-4(64 + -1x) + 3x * (64 + -1x)) = 10
((64 * -4 + -1x * -4) + 3x * (64 + -1x)) = 10
((-256 + 4x) + 3x * (64 + -1x)) = 10
(-256 + 4x + (64 * 3x + -1x * 3x)) = 10
(-256 + 4x + (192x + -3x2)) = 10

Combine like terms: 4x + 192x = 196x
(-256 + 196x + -3x2) = 10

Solving
-256 + 196x + -3x2 = 10

Solving for variable 'x'.

Reorder the terms:
-256 + -10 + 196x + -3x2 = 10 + -10

Combine like terms: -256 + -10 = -266
-266 + 196x + -3x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-266 + 196x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
88.66666667 + -65.33333333x + x2 = 0

Move the constant term to the right:

Add '-88.66666667' to each side of the equation.
88.66666667 + -65.33333333x + -88.66666667 + x2 = 0 + -88.66666667

Reorder the terms:
88.66666667 + -88.66666667 + -65.33333333x + x2 = 0 + -88.66666667

Combine like terms: 88.66666667 + -88.66666667 = 0.00000000
0.00000000 + -65.33333333x + x2 = 0 + -88.66666667
-65.33333333x + x2 = 0 + -88.66666667

Combine like terms: 0 + -88.66666667 = -88.66666667
-65.33333333x + x2 = -88.66666667

The x term is -65.33333333x.  Take half its coefficient (-32.66666667).
Square it (1067.111111) and add it to both sides.

Add '1067.111111' to each side of the equation.
-65.33333333x + 1067.111111 + x2 = -88.66666667 + 1067.111111

Reorder the terms:
1067.111111 + -65.33333333x + x2 = -88.66666667 + 1067.111111

Combine like terms: -88.66666667 + 1067.111111 = 978.44444433
1067.111111 + -65.33333333x + x2 = 978.44444433

Factor a perfect square on the left side:
(x + -32.66666667)(x + -32.66666667) = 978.44444433

Calculate the square root of the right side: 31.280096616

Break this problem into two subproblems by setting 
(x + -32.66666667) equal to 31.280096616 and -31.280096616.

Subproblem 1

x + -32.66666667 = 31.280096616 Simplifying x + -32.66666667 = 31.280096616 Reorder the terms: -32.66666667 + x = 31.280096616 Solving -32.66666667 + x = 31.280096616 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '32.66666667' to each side of the equation. -32.66666667 + 32.66666667 + x = 31.280096616 + 32.66666667 Combine like terms: -32.66666667 + 32.66666667 = 0.00000000 0.00000000 + x = 31.280096616 + 32.66666667 x = 31.280096616 + 32.66666667 Combine like terms: 31.280096616 + 32.66666667 = 63.946763286 x = 63.946763286 Simplifying x = 63.946763286

Subproblem 2

x + -32.66666667 = -31.280096616 Simplifying x + -32.66666667 = -31.280096616 Reorder the terms: -32.66666667 + x = -31.280096616 Solving -32.66666667 + x = -31.280096616 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '32.66666667' to each side of the equation. -32.66666667 + 32.66666667 + x = -31.280096616 + 32.66666667 Combine like terms: -32.66666667 + 32.66666667 = 0.00000000 0.00000000 + x = -31.280096616 + 32.66666667 x = -31.280096616 + 32.66666667 Combine like terms: -31.280096616 + 32.66666667 = 1.386570054 x = 1.386570054 Simplifying x = 1.386570054

Solution

The solution to the problem is based on the solutions from the subproblems. x = {63.946763286, 1.386570054}

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