4u^2+120u=68

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Solution for 4u^2+120u=68 equation:


Simplifying
4u2 + 120u = 68

Reorder the terms:
120u + 4u2 = 68

Solving
120u + 4u2 = 68

Solving for variable 'u'.

Reorder the terms:
-68 + 120u + 4u2 = 68 + -68

Combine like terms: 68 + -68 = 0
-68 + 120u + 4u2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-17 + 30u + u2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-17 + 30u + u2)' equal to zero and attempt to solve: Simplifying -17 + 30u + u2 = 0 Solving -17 + 30u + u2 = 0 Begin completing the square. Move the constant term to the right: Add '17' to each side of the equation. -17 + 30u + 17 + u2 = 0 + 17 Reorder the terms: -17 + 17 + 30u + u2 = 0 + 17 Combine like terms: -17 + 17 = 0 0 + 30u + u2 = 0 + 17 30u + u2 = 0 + 17 Combine like terms: 0 + 17 = 17 30u + u2 = 17 The u term is 30u. Take half its coefficient (15). Square it (225) and add it to both sides. Add '225' to each side of the equation. 30u + 225 + u2 = 17 + 225 Reorder the terms: 225 + 30u + u2 = 17 + 225 Combine like terms: 17 + 225 = 242 225 + 30u + u2 = 242 Factor a perfect square on the left side: (u + 15)(u + 15) = 242 Calculate the square root of the right side: 15.556349186 Break this problem into two subproblems by setting (u + 15) equal to 15.556349186 and -15.556349186.

Subproblem 1

u + 15 = 15.556349186 Simplifying u + 15 = 15.556349186 Reorder the terms: 15 + u = 15.556349186 Solving 15 + u = 15.556349186 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + u = 15.556349186 + -15 Combine like terms: 15 + -15 = 0 0 + u = 15.556349186 + -15 u = 15.556349186 + -15 Combine like terms: 15.556349186 + -15 = 0.556349186 u = 0.556349186 Simplifying u = 0.556349186

Subproblem 2

u + 15 = -15.556349186 Simplifying u + 15 = -15.556349186 Reorder the terms: 15 + u = -15.556349186 Solving 15 + u = -15.556349186 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + u = -15.556349186 + -15 Combine like terms: 15 + -15 = 0 0 + u = -15.556349186 + -15 u = -15.556349186 + -15 Combine like terms: -15.556349186 + -15 = -30.556349186 u = -30.556349186 Simplifying u = -30.556349186

Solution

The solution to the problem is based on the solutions from the subproblems. u = {0.556349186, -30.556349186}

Solution

u = {0.556349186, -30.556349186}

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