4u^2+6u+9=0

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Solution for 4u^2+6u+9=0 equation:


Simplifying
4u2 + 6u + 9 = 0

Reorder the terms:
9 + 6u + 4u2 = 0

Solving
9 + 6u + 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'.
2.25 + 1.5u + u2 = 0

Move the constant term to the right:

Add '-2.25' to each side of the equation.
2.25 + 1.5u + -2.25 + u2 = 0 + -2.25

Reorder the terms:
2.25 + -2.25 + 1.5u + u2 = 0 + -2.25

Combine like terms: 2.25 + -2.25 = 0.00
0.00 + 1.5u + u2 = 0 + -2.25
1.5u + u2 = 0 + -2.25

Combine like terms: 0 + -2.25 = -2.25
1.5u + u2 = -2.25

The u term is 1.5u.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5u + 0.5625 + u2 = -2.25 + 0.5625

Reorder the terms:
0.5625 + 1.5u + u2 = -2.25 + 0.5625

Combine like terms: -2.25 + 0.5625 = -1.6875
0.5625 + 1.5u + u2 = -1.6875

Factor a perfect square on the left side:
(u + 0.75)(u + 0.75) = -1.6875

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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