16x+2x^2=188.5

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Solution for 16x+2x^2=188.5 equation:


Simplifying
16x + 2x2 = 188.5

Solving
16x + 2x2 = 188.5

Solving for variable 'x'.

Reorder the terms:
-188.5 + 16x + 2x2 = 188.5 + -188.5

Combine like terms: 188.5 + -188.5 = 0.0
-188.5 + 16x + 2x2 = 0.0

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

Divide each side by '2'.
-94.25 + 8x + x2 = 0.0

Move the constant term to the right:

Add '94.25' to each side of the equation.
-94.25 + 8x + 94.25 + x2 = 0.0 + 94.25

Reorder the terms:
-94.25 + 94.25 + 8x + x2 = 0.0 + 94.25

Combine like terms: -94.25 + 94.25 = 0.00
0.00 + 8x + x2 = 0.0 + 94.25
8x + x2 = 0.0 + 94.25

Combine like terms: 0.0 + 94.25 = 94.25
8x + x2 = 94.25

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 = 94.25 + 16

Reorder the terms:
16 + 8x + x2 = 94.25 + 16

Combine like terms: 94.25 + 16 = 110.25
16 + 8x + x2 = 110.25

Factor a perfect square on the left side:
(x + 4)(x + 4) = 110.25

Calculate the square root of the right side: 10.5

Break this problem into two subproblems by setting 
(x + 4) equal to 10.5 and -10.5.

Subproblem 1

x + 4 = 10.5 Simplifying x + 4 = 10.5 Reorder the terms: 4 + x = 10.5 Solving 4 + x = 10.5 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 = 10.5 + -4 Combine like terms: 4 + -4 = 0 0 + x = 10.5 + -4 x = 10.5 + -4 Combine like terms: 10.5 + -4 = 6.5 x = 6.5 Simplifying x = 6.5

Subproblem 2

x + 4 = -10.5 Simplifying x + 4 = -10.5 Reorder the terms: 4 + x = -10.5 Solving 4 + x = -10.5 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 = -10.5 + -4 Combine like terms: 4 + -4 = 0 0 + x = -10.5 + -4 x = -10.5 + -4 Combine like terms: -10.5 + -4 = -14.5 x = -14.5 Simplifying x = -14.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.5, -14.5}

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