5x+3x^2=96

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Solution for 5x+3x^2=96 equation:


Simplifying
5x + 3x2 = 96

Solving
5x + 3x2 = 96

Solving for variable 'x'.

Reorder the terms:
-96 + 5x + 3x2 = 96 + -96

Combine like terms: 96 + -96 = 0
-96 + 5x + 3x2 = 0

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

Divide each side by '3'.
-32 + 1.666666667x + x2 = 0

Move the constant term to the right:

Add '32' to each side of the equation.
-32 + 1.666666667x + 32 + x2 = 0 + 32

Reorder the terms:
-32 + 32 + 1.666666667x + x2 = 0 + 32

Combine like terms: -32 + 32 = 0
0 + 1.666666667x + x2 = 0 + 32
1.666666667x + x2 = 0 + 32

Combine like terms: 0 + 32 = 32
1.666666667x + x2 = 32

The x term is 1.666666667x.  Take half its coefficient (0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
1.666666667x + 0.6944444447 + x2 = 32 + 0.6944444447

Reorder the terms:
0.6944444447 + 1.666666667x + x2 = 32 + 0.6944444447

Combine like terms: 32 + 0.6944444447 = 32.6944444447
0.6944444447 + 1.666666667x + x2 = 32.6944444447

Factor a perfect square on the left side:
(x + 0.8333333335)(x + 0.8333333335) = 32.6944444447

Calculate the square root of the right side: 5.717905599

Break this problem into two subproblems by setting 
(x + 0.8333333335) equal to 5.717905599 and -5.717905599.

Subproblem 1

x + 0.8333333335 = 5.717905599 Simplifying x + 0.8333333335 = 5.717905599 Reorder the terms: 0.8333333335 + x = 5.717905599 Solving 0.8333333335 + x = 5.717905599 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = 5.717905599 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = 5.717905599 + -0.8333333335 x = 5.717905599 + -0.8333333335 Combine like terms: 5.717905599 + -0.8333333335 = 4.8845722655 x = 4.8845722655 Simplifying x = 4.8845722655

Subproblem 2

x + 0.8333333335 = -5.717905599 Simplifying x + 0.8333333335 = -5.717905599 Reorder the terms: 0.8333333335 + x = -5.717905599 Solving 0.8333333335 + x = -5.717905599 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = -5.717905599 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = -5.717905599 + -0.8333333335 x = -5.717905599 + -0.8333333335 Combine like terms: -5.717905599 + -0.8333333335 = -6.5512389325 x = -6.5512389325 Simplifying x = -6.5512389325

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.8845722655, -6.5512389325}

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