3x^2+2.25x-48.18=0

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Solution for 3x^2+2.25x-48.18=0 equation:


Simplifying
3x2 + 2.25x + -48.18 = 0

Reorder the terms:
-48.18 + 2.25x + 3x2 = 0

Solving
-48.18 + 2.25x + 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'.
-16.06 + 0.75x + x2 = 0

Move the constant term to the right:

Add '16.06' to each side of the equation.
-16.06 + 0.75x + 16.06 + x2 = 0 + 16.06

Reorder the terms:
-16.06 + 16.06 + 0.75x + x2 = 0 + 16.06

Combine like terms: -16.06 + 16.06 = 0.00
0.00 + 0.75x + x2 = 0 + 16.06
0.75x + x2 = 0 + 16.06

Combine like terms: 0 + 16.06 = 16.06
0.75x + x2 = 16.06

The x term is 0.75x.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75x + 0.140625 + x2 = 16.06 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = 16.06 + 0.140625

Combine like terms: 16.06 + 0.140625 = 16.200625
0.140625 + 0.75x + x2 = 16.200625

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = 16.200625

Calculate the square root of the right side: 4.025

Break this problem into two subproblems by setting 
(x + 0.375) equal to 4.025 and -4.025.

Subproblem 1

x + 0.375 = 4.025 Simplifying x + 0.375 = 4.025 Reorder the terms: 0.375 + x = 4.025 Solving 0.375 + x = 4.025 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = 4.025 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = 4.025 + -0.375 x = 4.025 + -0.375 Combine like terms: 4.025 + -0.375 = 3.65 x = 3.65 Simplifying x = 3.65

Subproblem 2

x + 0.375 = -4.025 Simplifying x + 0.375 = -4.025 Reorder the terms: 0.375 + x = -4.025 Solving 0.375 + x = -4.025 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = -4.025 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = -4.025 + -0.375 x = -4.025 + -0.375 Combine like terms: -4.025 + -0.375 = -4.4 x = -4.4 Simplifying x = -4.4

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.65, -4.4}

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