4x=2x^2+20x-33

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Solution for 4x=2x^2+20x-33 equation:


Simplifying
4x = 2x2 + 20x + -33

Reorder the terms:
4x = -33 + 20x + 2x2

Solving
4x = -33 + 20x + 2x2

Solving for variable 'x'.

Reorder the terms:
33 + 4x + -20x + -2x2 = -33 + 20x + 2x2 + 33 + -20x + -2x2

Combine like terms: 4x + -20x = -16x
33 + -16x + -2x2 = -33 + 20x + 2x2 + 33 + -20x + -2x2

Reorder the terms:
33 + -16x + -2x2 = -33 + 33 + 20x + -20x + 2x2 + -2x2

Combine like terms: -33 + 33 = 0
33 + -16x + -2x2 = 0 + 20x + -20x + 2x2 + -2x2
33 + -16x + -2x2 = 20x + -20x + 2x2 + -2x2

Combine like terms: 20x + -20x = 0
33 + -16x + -2x2 = 0 + 2x2 + -2x2
33 + -16x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
33 + -16x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-16.5 + 8x + x2 = 0

Move the constant term to the right:

Add '16.5' to each side of the equation.
-16.5 + 8x + 16.5 + x2 = 0 + 16.5

Reorder the terms:
-16.5 + 16.5 + 8x + x2 = 0 + 16.5

Combine like terms: -16.5 + 16.5 = 0.0
0.0 + 8x + x2 = 0 + 16.5
8x + x2 = 0 + 16.5

Combine like terms: 0 + 16.5 = 16.5
8x + x2 = 16.5

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 = 16.5 + 16

Reorder the terms:
16 + 8x + x2 = 16.5 + 16

Combine like terms: 16.5 + 16 = 32.5
16 + 8x + x2 = 32.5

Factor a perfect square on the left side:
(x + 4)(x + 4) = 32.5

Calculate the square root of the right side: 5.700877125

Break this problem into two subproblems by setting 
(x + 4) equal to 5.700877125 and -5.700877125.

Subproblem 1

x + 4 = 5.700877125 Simplifying x + 4 = 5.700877125 Reorder the terms: 4 + x = 5.700877125 Solving 4 + x = 5.700877125 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 = 5.700877125 + -4 Combine like terms: 4 + -4 = 0 0 + x = 5.700877125 + -4 x = 5.700877125 + -4 Combine like terms: 5.700877125 + -4 = 1.700877125 x = 1.700877125 Simplifying x = 1.700877125

Subproblem 2

x + 4 = -5.700877125 Simplifying x + 4 = -5.700877125 Reorder the terms: 4 + x = -5.700877125 Solving 4 + x = -5.700877125 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 = -5.700877125 + -4 Combine like terms: 4 + -4 = 0 0 + x = -5.700877125 + -4 x = -5.700877125 + -4 Combine like terms: -5.700877125 + -4 = -9.700877125 x = -9.700877125 Simplifying x = -9.700877125

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.700877125, -9.700877125}

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