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

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


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

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

Solving
x = -33 + 8x + x2

Solving for variable 'x'.

Reorder the terms:
33 + x + -8x + -1x2 = -33 + 8x + x2 + 33 + -8x + -1x2

Combine like terms: x + -8x = -7x
33 + -7x + -1x2 = -33 + 8x + x2 + 33 + -8x + -1x2

Reorder the terms:
33 + -7x + -1x2 = -33 + 33 + 8x + -8x + x2 + -1x2

Combine like terms: -33 + 33 = 0
33 + -7x + -1x2 = 0 + 8x + -8x + x2 + -1x2
33 + -7x + -1x2 = 8x + -8x + x2 + -1x2

Combine like terms: 8x + -8x = 0
33 + -7x + -1x2 = 0 + x2 + -1x2
33 + -7x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
33 + -7x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-33 + 7x + x2 = 0

Move the constant term to the right:

Add '33' to each side of the equation.
-33 + 7x + 33 + x2 = 0 + 33

Reorder the terms:
-33 + 33 + 7x + x2 = 0 + 33

Combine like terms: -33 + 33 = 0
0 + 7x + x2 = 0 + 33
7x + x2 = 0 + 33

Combine like terms: 0 + 33 = 33
7x + x2 = 33

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = 33 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 33 + 12.25

Combine like terms: 33 + 12.25 = 45.25
12.25 + 7x + x2 = 45.25

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 45.25

Calculate the square root of the right side: 6.726812024

Break this problem into two subproblems by setting 
(x + 3.5) equal to 6.726812024 and -6.726812024.

Subproblem 1

x + 3.5 = 6.726812024 Simplifying x + 3.5 = 6.726812024 Reorder the terms: 3.5 + x = 6.726812024 Solving 3.5 + x = 6.726812024 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 6.726812024 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 6.726812024 + -3.5 x = 6.726812024 + -3.5 Combine like terms: 6.726812024 + -3.5 = 3.226812024 x = 3.226812024 Simplifying x = 3.226812024

Subproblem 2

x + 3.5 = -6.726812024 Simplifying x + 3.5 = -6.726812024 Reorder the terms: 3.5 + x = -6.726812024 Solving 3.5 + x = -6.726812024 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -6.726812024 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -6.726812024 + -3.5 x = -6.726812024 + -3.5 Combine like terms: -6.726812024 + -3.5 = -10.226812024 x = -10.226812024 Simplifying x = -10.226812024

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.226812024, -10.226812024}

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