5x^2-9x-24=0

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Solution for 5x^2-9x-24=0 equation:


Simplifying
5x2 + -9x + -24 = 0

Reorder the terms:
-24 + -9x + 5x2 = 0

Solving
-24 + -9x + 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 + -1.8x + x2 = 0

Move the constant term to the right:

Add '4.8' to each side of the equation.
-4.8 + -1.8x + 4.8 + x2 = 0 + 4.8

Reorder the terms:
-4.8 + 4.8 + -1.8x + x2 = 0 + 4.8

Combine like terms: -4.8 + 4.8 = 0.0
0.0 + -1.8x + x2 = 0 + 4.8
-1.8x + x2 = 0 + 4.8

Combine like terms: 0 + 4.8 = 4.8
-1.8x + x2 = 4.8

The x term is -1.8x.  Take half its coefficient (-0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
-1.8x + 0.81 + x2 = 4.8 + 0.81

Reorder the terms:
0.81 + -1.8x + x2 = 4.8 + 0.81

Combine like terms: 4.8 + 0.81 = 5.61
0.81 + -1.8x + x2 = 5.61

Factor a perfect square on the left side:
(x + -0.9)(x + -0.9) = 5.61

Calculate the square root of the right side: 2.368543856

Break this problem into two subproblems by setting 
(x + -0.9) equal to 2.368543856 and -2.368543856.

Subproblem 1

x + -0.9 = 2.368543856 Simplifying x + -0.9 = 2.368543856 Reorder the terms: -0.9 + x = 2.368543856 Solving -0.9 + x = 2.368543856 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9' to each side of the equation. -0.9 + 0.9 + x = 2.368543856 + 0.9 Combine like terms: -0.9 + 0.9 = 0.0 0.0 + x = 2.368543856 + 0.9 x = 2.368543856 + 0.9 Combine like terms: 2.368543856 + 0.9 = 3.268543856 x = 3.268543856 Simplifying x = 3.268543856

Subproblem 2

x + -0.9 = -2.368543856 Simplifying x + -0.9 = -2.368543856 Reorder the terms: -0.9 + x = -2.368543856 Solving -0.9 + x = -2.368543856 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9' to each side of the equation. -0.9 + 0.9 + x = -2.368543856 + 0.9 Combine like terms: -0.9 + 0.9 = 0.0 0.0 + x = -2.368543856 + 0.9 x = -2.368543856 + 0.9 Combine like terms: -2.368543856 + 0.9 = -1.468543856 x = -1.468543856 Simplifying x = -1.468543856

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.268543856, -1.468543856}

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