33=x+8(x^2-6x-7)

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Solution for 33=x+8(x^2-6x-7) equation:


Simplifying
33 = x + 8(x2 + -6x + -7)

Reorder the terms:
33 = x + 8(-7 + -6x + x2)
33 = x + (-7 * 8 + -6x * 8 + x2 * 8)
33 = x + (-56 + -48x + 8x2)

Reorder the terms:
33 = -56 + x + -48x + 8x2

Combine like terms: x + -48x = -47x
33 = -56 + -47x + 8x2

Solving
33 = -56 + -47x + 8x2

Solving for variable 'x'.

Combine like terms: 33 + 56 = 89
89 + 47x + -8x2 = -56 + -47x + 8x2 + 56 + 47x + -8x2

Reorder the terms:
89 + 47x + -8x2 = -56 + 56 + -47x + 47x + 8x2 + -8x2

Combine like terms: -56 + 56 = 0
89 + 47x + -8x2 = 0 + -47x + 47x + 8x2 + -8x2
89 + 47x + -8x2 = -47x + 47x + 8x2 + -8x2

Combine like terms: -47x + 47x = 0
89 + 47x + -8x2 = 0 + 8x2 + -8x2
89 + 47x + -8x2 = 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
89 + 47x + -8x2 = 0

Begin completing the square.  Divide all terms by
-8 the coefficient of the squared term: 

Divide each side by '-8'.
-11.125 + -5.875x + x2 = 0

Move the constant term to the right:

Add '11.125' to each side of the equation.
-11.125 + -5.875x + 11.125 + x2 = 0 + 11.125

Reorder the terms:
-11.125 + 11.125 + -5.875x + x2 = 0 + 11.125

Combine like terms: -11.125 + 11.125 = 0.000
0.000 + -5.875x + x2 = 0 + 11.125
-5.875x + x2 = 0 + 11.125

Combine like terms: 0 + 11.125 = 11.125
-5.875x + x2 = 11.125

The x term is -5.875x.  Take half its coefficient (-2.9375).
Square it (8.62890625) and add it to both sides.

Add '8.62890625' to each side of the equation.
-5.875x + 8.62890625 + x2 = 11.125 + 8.62890625

Reorder the terms:
8.62890625 + -5.875x + x2 = 11.125 + 8.62890625

Combine like terms: 11.125 + 8.62890625 = 19.75390625
8.62890625 + -5.875x + x2 = 19.75390625

Factor a perfect square on the left side:
(x + -2.9375)(x + -2.9375) = 19.75390625

Calculate the square root of the right side: 4.444536674

Break this problem into two subproblems by setting 
(x + -2.9375) equal to 4.444536674 and -4.444536674.

Subproblem 1

x + -2.9375 = 4.444536674 Simplifying x + -2.9375 = 4.444536674 Reorder the terms: -2.9375 + x = 4.444536674 Solving -2.9375 + x = 4.444536674 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.9375' to each side of the equation. -2.9375 + 2.9375 + x = 4.444536674 + 2.9375 Combine like terms: -2.9375 + 2.9375 = 0.0000 0.0000 + x = 4.444536674 + 2.9375 x = 4.444536674 + 2.9375 Combine like terms: 4.444536674 + 2.9375 = 7.382036674 x = 7.382036674 Simplifying x = 7.382036674

Subproblem 2

x + -2.9375 = -4.444536674 Simplifying x + -2.9375 = -4.444536674 Reorder the terms: -2.9375 + x = -4.444536674 Solving -2.9375 + x = -4.444536674 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.9375' to each side of the equation. -2.9375 + 2.9375 + x = -4.444536674 + 2.9375 Combine like terms: -2.9375 + 2.9375 = 0.0000 0.0000 + x = -4.444536674 + 2.9375 x = -4.444536674 + 2.9375 Combine like terms: -4.444536674 + 2.9375 = -1.507036674 x = -1.507036674 Simplifying x = -1.507036674

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.382036674, -1.507036674}

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