2u^2+7u+15=0

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Solution for 2u^2+7u+15=0 equation:


Simplifying
2u2 + 7u + 15 = 0

Reorder the terms:
15 + 7u + 2u2 = 0

Solving
15 + 7u + 2u2 = 0

Solving for variable 'u'.

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

Divide each side by '2'.
7.5 + 3.5u + u2 = 0

Move the constant term to the right:

Add '-7.5' to each side of the equation.
7.5 + 3.5u + -7.5 + u2 = 0 + -7.5

Reorder the terms:
7.5 + -7.5 + 3.5u + u2 = 0 + -7.5

Combine like terms: 7.5 + -7.5 = 0.0
0.0 + 3.5u + u2 = 0 + -7.5
3.5u + u2 = 0 + -7.5

Combine like terms: 0 + -7.5 = -7.5
3.5u + u2 = -7.5

The u term is 3.5u.  Take half its coefficient (1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
3.5u + 3.0625 + u2 = -7.5 + 3.0625

Reorder the terms:
3.0625 + 3.5u + u2 = -7.5 + 3.0625

Combine like terms: -7.5 + 3.0625 = -4.4375
3.0625 + 3.5u + u2 = -4.4375

Factor a perfect square on the left side:
(u + 1.75)(u + 1.75) = -4.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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