-5u^2+7u-4=0

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Solution for -5u^2+7u-4=0 equation:


Simplifying
-5u2 + 7u + -4 = 0

Reorder the terms:
-4 + 7u + -5u2 = 0

Solving
-4 + 7u + -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'.
0.8 + -1.4u + u2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + -1.4u + -0.8 + u2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + -1.4u + u2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + -1.4u + u2 = 0 + -0.8
-1.4u + u2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
-1.4u + u2 = -0.8

The u term is -1.4u.  Take half its coefficient (-0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
-1.4u + 0.49 + u2 = -0.8 + 0.49

Reorder the terms:
0.49 + -1.4u + u2 = -0.8 + 0.49

Combine like terms: -0.8 + 0.49 = -0.31
0.49 + -1.4u + u2 = -0.31

Factor a perfect square on the left side:
(u + -0.7)(u + -0.7) = -0.31

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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