3u^2-5u-24=0

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Solution for 3u^2-5u-24=0 equation:


Simplifying
3u2 + -5u + -24 = 0

Reorder the terms:
-24 + -5u + 3u2 = 0

Solving
-24 + -5u + 3u2 = 0

Solving for variable 'u'.

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

Divide each side by '3'.
-8 + -1.666666667u + u2 = 0

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + -1.666666667u + 8 + u2 = 0 + 8

Reorder the terms:
-8 + 8 + -1.666666667u + u2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + -1.666666667u + u2 = 0 + 8
-1.666666667u + u2 = 0 + 8

Combine like terms: 0 + 8 = 8
-1.666666667u + u2 = 8

The u term is -1.666666667u.  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.
-1.666666667u + 0.6944444447 + u2 = 8 + 0.6944444447

Reorder the terms:
0.6944444447 + -1.666666667u + u2 = 8 + 0.6944444447

Combine like terms: 8 + 0.6944444447 = 8.6944444447
0.6944444447 + -1.666666667u + u2 = 8.6944444447

Factor a perfect square on the left side:
(u + -0.8333333335)(u + -0.8333333335) = 8.6944444447

Calculate the square root of the right side: 2.948634336

Break this problem into two subproblems by setting 
(u + -0.8333333335) equal to 2.948634336 and -2.948634336.

Subproblem 1

u + -0.8333333335 = 2.948634336 Simplifying u + -0.8333333335 = 2.948634336 Reorder the terms: -0.8333333335 + u = 2.948634336 Solving -0.8333333335 + u = 2.948634336 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + u = 2.948634336 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + u = 2.948634336 + 0.8333333335 u = 2.948634336 + 0.8333333335 Combine like terms: 2.948634336 + 0.8333333335 = 3.7819676695 u = 3.7819676695 Simplifying u = 3.7819676695

Subproblem 2

u + -0.8333333335 = -2.948634336 Simplifying u + -0.8333333335 = -2.948634336 Reorder the terms: -0.8333333335 + u = -2.948634336 Solving -0.8333333335 + u = -2.948634336 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + u = -2.948634336 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + u = -2.948634336 + 0.8333333335 u = -2.948634336 + 0.8333333335 Combine like terms: -2.948634336 + 0.8333333335 = -2.1153010025 u = -2.1153010025 Simplifying u = -2.1153010025

Solution

The solution to the problem is based on the solutions from the subproblems. u = {3.7819676695, -2.1153010025}

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