5u^2+3u-70=

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Solution for 5u^2+3u-70= equation:


Simplifying
5u2 + 3u + -70 = 0

Reorder the terms:
-70 + 3u + 5u2 = 0

Solving
-70 + 3u + 5u2 = 0

Solving for variable 'u'.

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

Divide each side by '5'.
-14 + 0.6u + u2 = 0

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 0.6u + 14 + u2 = 0 + 14

Reorder the terms:
-14 + 14 + 0.6u + u2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 0.6u + u2 = 0 + 14
0.6u + u2 = 0 + 14

Combine like terms: 0 + 14 = 14
0.6u + u2 = 14

The u term is 0.6u.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6u + 0.09 + u2 = 14 + 0.09

Reorder the terms:
0.09 + 0.6u + u2 = 14 + 0.09

Combine like terms: 14 + 0.09 = 14.09
0.09 + 0.6u + u2 = 14.09

Factor a perfect square on the left side:
(u + 0.3)(u + 0.3) = 14.09

Calculate the square root of the right side: 3.753664876

Break this problem into two subproblems by setting 
(u + 0.3) equal to 3.753664876 and -3.753664876.

Subproblem 1

u + 0.3 = 3.753664876 Simplifying u + 0.3 = 3.753664876 Reorder the terms: 0.3 + u = 3.753664876 Solving 0.3 + u = 3.753664876 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + u = 3.753664876 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + u = 3.753664876 + -0.3 u = 3.753664876 + -0.3 Combine like terms: 3.753664876 + -0.3 = 3.453664876 u = 3.453664876 Simplifying u = 3.453664876

Subproblem 2

u + 0.3 = -3.753664876 Simplifying u + 0.3 = -3.753664876 Reorder the terms: 0.3 + u = -3.753664876 Solving 0.3 + u = -3.753664876 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + u = -3.753664876 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + u = -3.753664876 + -0.3 u = -3.753664876 + -0.3 Combine like terms: -3.753664876 + -0.3 = -4.053664876 u = -4.053664876 Simplifying u = -4.053664876

Solution

The solution to the problem is based on the solutions from the subproblems. u = {3.453664876, -4.053664876}

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