3x(x-4)+8=2(x^2-6)+57

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Solution for 3x(x-4)+8=2(x^2-6)+57 equation:


Simplifying
3x(x + -4) + 8 = 2(x2 + -6) + 57

Reorder the terms:
3x(-4 + x) + 8 = 2(x2 + -6) + 57
(-4 * 3x + x * 3x) + 8 = 2(x2 + -6) + 57
(-12x + 3x2) + 8 = 2(x2 + -6) + 57

Reorder the terms:
8 + -12x + 3x2 = 2(x2 + -6) + 57

Reorder the terms:
8 + -12x + 3x2 = 2(-6 + x2) + 57
8 + -12x + 3x2 = (-6 * 2 + x2 * 2) + 57
8 + -12x + 3x2 = (-12 + 2x2) + 57

Reorder the terms:
8 + -12x + 3x2 = -12 + 57 + 2x2

Combine like terms: -12 + 57 = 45
8 + -12x + 3x2 = 45 + 2x2

Solving
8 + -12x + 3x2 = 45 + 2x2

Solving for variable 'x'.

Reorder the terms:
8 + -45 + -12x + 3x2 + -2x2 = 45 + 2x2 + -45 + -2x2

Combine like terms: 8 + -45 = -37
-37 + -12x + 3x2 + -2x2 = 45 + 2x2 + -45 + -2x2

Combine like terms: 3x2 + -2x2 = 1x2
-37 + -12x + 1x2 = 45 + 2x2 + -45 + -2x2

Reorder the terms:
-37 + -12x + 1x2 = 45 + -45 + 2x2 + -2x2

Combine like terms: 45 + -45 = 0
-37 + -12x + 1x2 = 0 + 2x2 + -2x2
-37 + -12x + 1x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-37 + -12x + 1x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '37' to each side of the equation.
-37 + -12x + 37 + x2 = 0 + 37

Reorder the terms:
-37 + 37 + -12x + x2 = 0 + 37

Combine like terms: -37 + 37 = 0
0 + -12x + x2 = 0 + 37
-12x + x2 = 0 + 37

Combine like terms: 0 + 37 = 37
-12x + x2 = 37

The x term is -12x.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12x + 36 + x2 = 37 + 36

Reorder the terms:
36 + -12x + x2 = 37 + 36

Combine like terms: 37 + 36 = 73
36 + -12x + x2 = 73

Factor a perfect square on the left side:
(x + -6)(x + -6) = 73

Calculate the square root of the right side: 8.544003745

Break this problem into two subproblems by setting 
(x + -6) equal to 8.544003745 and -8.544003745.

Subproblem 1

x + -6 = 8.544003745 Simplifying x + -6 = 8.544003745 Reorder the terms: -6 + x = 8.544003745 Solving -6 + x = 8.544003745 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 8.544003745 + 6 Combine like terms: -6 + 6 = 0 0 + x = 8.544003745 + 6 x = 8.544003745 + 6 Combine like terms: 8.544003745 + 6 = 14.544003745 x = 14.544003745 Simplifying x = 14.544003745

Subproblem 2

x + -6 = -8.544003745 Simplifying x + -6 = -8.544003745 Reorder the terms: -6 + x = -8.544003745 Solving -6 + x = -8.544003745 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -8.544003745 + 6 Combine like terms: -6 + 6 = 0 0 + x = -8.544003745 + 6 x = -8.544003745 + 6 Combine like terms: -8.544003745 + 6 = -2.544003745 x = -2.544003745 Simplifying x = -2.544003745

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.544003745, -2.544003745}

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