5x^2+18x-24=0

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Solution for 5x^2+18x-24=0 equation:


Simplifying
5x2 + 18x + -24 = 0

Reorder the terms:
-24 + 18x + 5x2 = 0

Solving
-24 + 18x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-4.8 + 3.6x + x2 = 0

Move the constant term to the right:

Add '4.8' to each side of the equation.
-4.8 + 3.6x + 4.8 + x2 = 0 + 4.8

Reorder the terms:
-4.8 + 4.8 + 3.6x + x2 = 0 + 4.8

Combine like terms: -4.8 + 4.8 = 0.0
0.0 + 3.6x + x2 = 0 + 4.8
3.6x + x2 = 0 + 4.8

Combine like terms: 0 + 4.8 = 4.8
3.6x + x2 = 4.8

The x term is 3.6x.  Take half its coefficient (1.8).
Square it (3.24) and add it to both sides.

Add '3.24' to each side of the equation.
3.6x + 3.24 + x2 = 4.8 + 3.24

Reorder the terms:
3.24 + 3.6x + x2 = 4.8 + 3.24

Combine like terms: 4.8 + 3.24 = 8.04
3.24 + 3.6x + x2 = 8.04

Factor a perfect square on the left side:
(x + 1.8)(x + 1.8) = 8.04

Calculate the square root of the right side: 2.835489376

Break this problem into two subproblems by setting 
(x + 1.8) equal to 2.835489376 and -2.835489376.

Subproblem 1

x + 1.8 = 2.835489376 Simplifying x + 1.8 = 2.835489376 Reorder the terms: 1.8 + x = 2.835489376 Solving 1.8 + x = 2.835489376 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.8' to each side of the equation. 1.8 + -1.8 + x = 2.835489376 + -1.8 Combine like terms: 1.8 + -1.8 = 0.0 0.0 + x = 2.835489376 + -1.8 x = 2.835489376 + -1.8 Combine like terms: 2.835489376 + -1.8 = 1.035489376 x = 1.035489376 Simplifying x = 1.035489376

Subproblem 2

x + 1.8 = -2.835489376 Simplifying x + 1.8 = -2.835489376 Reorder the terms: 1.8 + x = -2.835489376 Solving 1.8 + x = -2.835489376 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.8' to each side of the equation. 1.8 + -1.8 + x = -2.835489376 + -1.8 Combine like terms: 1.8 + -1.8 = 0.0 0.0 + x = -2.835489376 + -1.8 x = -2.835489376 + -1.8 Combine like terms: -2.835489376 + -1.8 = -4.635489376 x = -4.635489376 Simplifying x = -4.635489376

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.035489376, -4.635489376}

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