9x+30=-2x^2

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Solution for 9x+30=-2x^2 equation:


Simplifying
9x + 30 = -2x2

Reorder the terms:
30 + 9x = -2x2

Solving
30 + 9x = -2x2

Solving for variable 'x'.

Combine like terms: -2x2 + 2x2 = 0
30 + 9x + 2x2 = 0

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

Divide each side by '2'.
15 + 4.5x + x2 = 0

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + 4.5x + -15 + x2 = 0 + -15

Reorder the terms:
15 + -15 + 4.5x + x2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + 4.5x + x2 = 0 + -15
4.5x + x2 = 0 + -15

Combine like terms: 0 + -15 = -15
4.5x + x2 = -15

The x term is 4.5x.  Take half its coefficient (2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
4.5x + 5.0625 + x2 = -15 + 5.0625

Reorder the terms:
5.0625 + 4.5x + x2 = -15 + 5.0625

Combine like terms: -15 + 5.0625 = -9.9375
5.0625 + 4.5x + x2 = -9.9375

Factor a perfect square on the left side:
(x + 2.25)(x + 2.25) = -9.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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