4u^2+9u-22=0

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Solution for 4u^2+9u-22=0 equation:


Simplifying
4u2 + 9u + -22 = 0

Reorder the terms:
-22 + 9u + 4u2 = 0

Solving
-22 + 9u + 4u2 = 0

Solving for variable 'u'.

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

Divide each side by '4'.
-5.5 + 2.25u + u2 = 0

Move the constant term to the right:

Add '5.5' to each side of the equation.
-5.5 + 2.25u + 5.5 + u2 = 0 + 5.5

Reorder the terms:
-5.5 + 5.5 + 2.25u + u2 = 0 + 5.5

Combine like terms: -5.5 + 5.5 = 0.0
0.0 + 2.25u + u2 = 0 + 5.5
2.25u + u2 = 0 + 5.5

Combine like terms: 0 + 5.5 = 5.5
2.25u + u2 = 5.5

The u term is 2.25u.  Take half its coefficient (1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
2.25u + 1.265625 + u2 = 5.5 + 1.265625

Reorder the terms:
1.265625 + 2.25u + u2 = 5.5 + 1.265625

Combine like terms: 5.5 + 1.265625 = 6.765625
1.265625 + 2.25u + u2 = 6.765625

Factor a perfect square on the left side:
(u + 1.125)(u + 1.125) = 6.765625

Calculate the square root of the right side: 2.601081506

Break this problem into two subproblems by setting 
(u + 1.125) equal to 2.601081506 and -2.601081506.

Subproblem 1

u + 1.125 = 2.601081506 Simplifying u + 1.125 = 2.601081506 Reorder the terms: 1.125 + u = 2.601081506 Solving 1.125 + u = 2.601081506 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1.125' to each side of the equation. 1.125 + -1.125 + u = 2.601081506 + -1.125 Combine like terms: 1.125 + -1.125 = 0.000 0.000 + u = 2.601081506 + -1.125 u = 2.601081506 + -1.125 Combine like terms: 2.601081506 + -1.125 = 1.476081506 u = 1.476081506 Simplifying u = 1.476081506

Subproblem 2

u + 1.125 = -2.601081506 Simplifying u + 1.125 = -2.601081506 Reorder the terms: 1.125 + u = -2.601081506 Solving 1.125 + u = -2.601081506 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1.125' to each side of the equation. 1.125 + -1.125 + u = -2.601081506 + -1.125 Combine like terms: 1.125 + -1.125 = 0.000 0.000 + u = -2.601081506 + -1.125 u = -2.601081506 + -1.125 Combine like terms: -2.601081506 + -1.125 = -3.726081506 u = -3.726081506 Simplifying u = -3.726081506

Solution

The solution to the problem is based on the solutions from the subproblems. u = {1.476081506, -3.726081506}

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