5x^2+10=-4x

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Solution for 5x^2+10=-4x equation:


Simplifying
5x2 + 10 = -4x

Reorder the terms:
10 + 5x2 = -4x

Solving
10 + 5x2 = -4x

Solving for variable 'x'.

Reorder the terms:
10 + 4x + 5x2 = -4x + 4x

Combine like terms: -4x + 4x = 0
10 + 4x + 5x2 = 0

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

Divide each side by '5'.
2 + 0.8x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + 0.8x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + 0.8x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + 0.8x + x2 = 0 + -2
0.8x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
0.8x + x2 = -2

The x term is 0.8x.  Take half its coefficient (0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
0.8x + 0.16 + x2 = -2 + 0.16

Reorder the terms:
0.16 + 0.8x + x2 = -2 + 0.16

Combine like terms: -2 + 0.16 = -1.84
0.16 + 0.8x + x2 = -1.84

Factor a perfect square on the left side:
(x + 0.4)(x + 0.4) = -1.84

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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