0=(-9x^2)+16x+48

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Solution for 0=(-9x^2)+16x+48 equation:


Simplifying
0 = (-9x2) + 16x + 48

Reorder the terms:
0 = 48 + 16x + (-9x2)

Solving
0 = 48 + 16x + (-9x2)

Solving for variable 'x'.

Combine like terms: 0 + -48 = -48
-48 + -16x + (9x2) = 48 + 16x + (-9x2) + -48 + -16x + (9x2)

Reorder the terms:
-48 + -16x + (9x2) = 48 + -48 + 16x + -16x + (-9x2) + (9x2)

Combine like terms: 48 + -48 = 0
-48 + -16x + (9x2) = 0 + 16x + -16x + (-9x2) + (9x2)
-48 + -16x + (9x2) = 16x + -16x + (-9x2) + (9x2)

Combine like terms: 16x + -16x = 0
-48 + -16x + (9x2) = 0 + (-9x2) + (9x2)
-48 + -16x + (9x2) = (-9x2) + (9x2)

Combine like terms: (-9x2) + (9x2) = 0
-48 + -16x + (9x2) = 0

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

Divide each side by '9'.
-5.333333333 + -1.777777778x + x2 = 0

Move the constant term to the right:

Add '5.333333333' to each side of the equation.
-5.333333333 + -1.777777778x + 5.333333333 + x2 = 0 + 5.333333333

Reorder the terms:
-5.333333333 + 5.333333333 + -1.777777778x + x2 = 0 + 5.333333333

Combine like terms: -5.333333333 + 5.333333333 = 0.000000000
0.000000000 + -1.777777778x + x2 = 0 + 5.333333333
-1.777777778x + x2 = 0 + 5.333333333

Combine like terms: 0 + 5.333333333 = 5.333333333
-1.777777778x + x2 = 5.333333333

The x term is -1.777777778x.  Take half its coefficient (-0.888888889).
Square it (0.7901234570) and add it to both sides.

Add '0.7901234570' to each side of the equation.
-1.777777778x + 0.7901234570 + x2 = 5.333333333 + 0.7901234570

Reorder the terms:
0.7901234570 + -1.777777778x + x2 = 5.333333333 + 0.7901234570

Combine like terms: 5.333333333 + 0.7901234570 = 6.12345679
0.7901234570 + -1.777777778x + x2 = 6.12345679

Factor a perfect square on the left side:
((x) + -0.888888889)((x) + -0.888888889) = 6.12345679

Calculate the square root of the right side: 2.474561939

Break this problem into two subproblems by setting 
((x) + -0.888888889) equal to 2.474561939 and -2.474561939.

Subproblem 1

(x) + -0.888888889 = 2.474561939 Simplifying (x) + -0.888888889 = 2.474561939 x + -0.888888889 = 2.474561939 Reorder the terms: -0.888888889 + x = 2.474561939 Solving -0.888888889 + x = 2.474561939 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.888888889' to each side of the equation. -0.888888889 + 0.888888889 + x = 2.474561939 + 0.888888889 Combine like terms: -0.888888889 + 0.888888889 = 0.000000000 0.000000000 + x = 2.474561939 + 0.888888889 x = 2.474561939 + 0.888888889 Combine like terms: 2.474561939 + 0.888888889 = 3.363450828 x = 3.363450828 Simplifying x = 3.363450828

Subproblem 2

(x) + -0.888888889 = -2.474561939 Simplifying (x) + -0.888888889 = -2.474561939 x + -0.888888889 = -2.474561939 Reorder the terms: -0.888888889 + x = -2.474561939 Solving -0.888888889 + x = -2.474561939 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.888888889' to each side of the equation. -0.888888889 + 0.888888889 + x = -2.474561939 + 0.888888889 Combine like terms: -0.888888889 + 0.888888889 = 0.000000000 0.000000000 + x = -2.474561939 + 0.888888889 x = -2.474561939 + 0.888888889 Combine like terms: -2.474561939 + 0.888888889 = -1.58567305 x = -1.58567305 Simplifying x = -1.58567305

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.363450828, -1.58567305}

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