=-3x^2+360+16x

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Solution for =-3x^2+360+16x equation:


Simplifying
0 = -3x2 + 360 + 16x

Reorder the terms:
0 = 360 + 16x + -3x2

Solving
0 = 360 + 16x + -3x2

Solving for variable 'x'.

Combine like terms: 0 + -360 = -360
-360 + -16x + 3x2 = 360 + 16x + -3x2 + -360 + -16x + 3x2

Reorder the terms:
-360 + -16x + 3x2 = 360 + -360 + 16x + -16x + -3x2 + 3x2

Combine like terms: 360 + -360 = 0
-360 + -16x + 3x2 = 0 + 16x + -16x + -3x2 + 3x2
-360 + -16x + 3x2 = 16x + -16x + -3x2 + 3x2

Combine like terms: 16x + -16x = 0
-360 + -16x + 3x2 = 0 + -3x2 + 3x2
-360 + -16x + 3x2 = -3x2 + 3x2

Combine like terms: -3x2 + 3x2 = 0
-360 + -16x + 3x2 = 0

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

Divide each side by '3'.
-120 + -5.333333333x + x2 = 0

Move the constant term to the right:

Add '120' to each side of the equation.
-120 + -5.333333333x + 120 + x2 = 0 + 120

Reorder the terms:
-120 + 120 + -5.333333333x + x2 = 0 + 120

Combine like terms: -120 + 120 = 0
0 + -5.333333333x + x2 = 0 + 120
-5.333333333x + x2 = 0 + 120

Combine like terms: 0 + 120 = 120
-5.333333333x + x2 = 120

The x term is -5.333333333x.  Take half its coefficient (-2.666666667).
Square it (7.111111113) and add it to both sides.

Add '7.111111113' to each side of the equation.
-5.333333333x + 7.111111113 + x2 = 120 + 7.111111113

Reorder the terms:
7.111111113 + -5.333333333x + x2 = 120 + 7.111111113

Combine like terms: 120 + 7.111111113 = 127.111111113
7.111111113 + -5.333333333x + x2 = 127.111111113

Factor a perfect square on the left side:
(x + -2.666666667)(x + -2.666666667) = 127.111111113

Calculate the square root of the right side: 11.27435635

Break this problem into two subproblems by setting 
(x + -2.666666667) equal to 11.27435635 and -11.27435635.

Subproblem 1

x + -2.666666667 = 11.27435635 Simplifying x + -2.666666667 = 11.27435635 Reorder the terms: -2.666666667 + x = 11.27435635 Solving -2.666666667 + x = 11.27435635 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.666666667' to each side of the equation. -2.666666667 + 2.666666667 + x = 11.27435635 + 2.666666667 Combine like terms: -2.666666667 + 2.666666667 = 0.000000000 0.000000000 + x = 11.27435635 + 2.666666667 x = 11.27435635 + 2.666666667 Combine like terms: 11.27435635 + 2.666666667 = 13.941023017 x = 13.941023017 Simplifying x = 13.941023017

Subproblem 2

x + -2.666666667 = -11.27435635 Simplifying x + -2.666666667 = -11.27435635 Reorder the terms: -2.666666667 + x = -11.27435635 Solving -2.666666667 + x = -11.27435635 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.666666667' to each side of the equation. -2.666666667 + 2.666666667 + x = -11.27435635 + 2.666666667 Combine like terms: -2.666666667 + 2.666666667 = 0.000000000 0.000000000 + x = -11.27435635 + 2.666666667 x = -11.27435635 + 2.666666667 Combine like terms: -11.27435635 + 2.666666667 = -8.607689683 x = -8.607689683 Simplifying x = -8.607689683

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.941023017, -8.607689683}

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