3x^2-16x-48=0

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Solution for 3x^2-16x-48=0 equation:


Simplifying
3x2 + -16x + -48 = 0

Reorder the terms:
-48 + -16x + 3x2 = 0

Solving
-48 + -16x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-16 + -5.333333333x + x2 = 0

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + -5.333333333x + 16 + x2 = 0 + 16

Reorder the terms:
-16 + 16 + -5.333333333x + x2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + -5.333333333x + x2 = 0 + 16
-5.333333333x + x2 = 0 + 16

Combine like terms: 0 + 16 = 16
-5.333333333x + x2 = 16

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 = 16 + 7.111111113

Reorder the terms:
7.111111113 + -5.333333333x + x2 = 16 + 7.111111113

Combine like terms: 16 + 7.111111113 = 23.111111113
7.111111113 + -5.333333333x + x2 = 23.111111113

Factor a perfect square on the left side:
(x + -2.666666667)(x + -2.666666667) = 23.111111113

Calculate the square root of the right side: 4.807401701

Break this problem into two subproblems by setting 
(x + -2.666666667) equal to 4.807401701 and -4.807401701.

Subproblem 1

x + -2.666666667 = 4.807401701 Simplifying x + -2.666666667 = 4.807401701 Reorder the terms: -2.666666667 + x = 4.807401701 Solving -2.666666667 + x = 4.807401701 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 = 4.807401701 + 2.666666667 Combine like terms: -2.666666667 + 2.666666667 = 0.000000000 0.000000000 + x = 4.807401701 + 2.666666667 x = 4.807401701 + 2.666666667 Combine like terms: 4.807401701 + 2.666666667 = 7.474068368 x = 7.474068368 Simplifying x = 7.474068368

Subproblem 2

x + -2.666666667 = -4.807401701 Simplifying x + -2.666666667 = -4.807401701 Reorder the terms: -2.666666667 + x = -4.807401701 Solving -2.666666667 + x = -4.807401701 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 = -4.807401701 + 2.666666667 Combine like terms: -2.666666667 + 2.666666667 = 0.000000000 0.000000000 + x = -4.807401701 + 2.666666667 x = -4.807401701 + 2.666666667 Combine like terms: -4.807401701 + 2.666666667 = -2.140735034 x = -2.140735034 Simplifying x = -2.140735034

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.474068368, -2.140735034}

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