7.5+5x^2=-x

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Solution for 7.5+5x^2=-x equation:


Simplifying
7.5 + 5x2 = -1x

Solving
7.5 + 5x2 = -1x

Solving for variable 'x'.

Reorder the terms:
7.5 + x + 5x2 = -1x + x

Combine like terms: -1x + x = 0
7.5 + x + 5x2 = 0

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

Divide each side by '5'.
1.5 + 0.2x + x2 = 0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + 0.2x + -1.5 + x2 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + 0.2x + x2 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + 0.2x + x2 = 0 + -1.5
0.2x + x2 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
0.2x + x2 = -1.5

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.2x + 0.25 + x2 = -1.5 + 0.25

Reorder the terms:
0.25 + 0.2x + x2 = -1.5 + 0.25

Combine like terms: -1.5 + 0.25 = -1.25
0.25 + 0.2x + x2 = -1.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -1.25

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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