=0.1x^2+0.5x+15

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Solution for =0.1x^2+0.5x+15 equation:


Simplifying
0 = 0.1x2 + 0.5x + 15

Reorder the terms:
0 = 15 + 0.5x + 0.1x2

Solving
0 = 15 + 0.5x + 0.1x2

Solving for variable 'x'.

Combine like terms: 0 + -15 = -15
-15 + -0.5x + -0.1x2 = 15 + 0.5x + 0.1x2 + -15 + -0.5x + -0.1x2

Reorder the terms:
-15 + -0.5x + -0.1x2 = 15 + -15 + 0.5x + -0.5x + 0.1x2 + -0.1x2

Combine like terms: 15 + -15 = 0
-15 + -0.5x + -0.1x2 = 0 + 0.5x + -0.5x + 0.1x2 + -0.1x2
-15 + -0.5x + -0.1x2 = 0.5x + -0.5x + 0.1x2 + -0.1x2

Combine like terms: 0.5x + -0.5x = 0.0
-15 + -0.5x + -0.1x2 = 0.0 + 0.1x2 + -0.1x2
-15 + -0.5x + -0.1x2 = 0.1x2 + -0.1x2

Combine like terms: 0.1x2 + -0.1x2 = 0.0
-15 + -0.5x + -0.1x2 = 0.0

Begin completing the square.  Divide all terms by
-0.1 the coefficient of the squared term: 

Divide each side by '-0.1'.
150 + 5x + x2 = 0

Move the constant term to the right:

Add '-150' to each side of the equation.
150 + 5x + -150 + x2 = 0 + -150

Reorder the terms:
150 + -150 + 5x + x2 = 0 + -150

Combine like terms: 150 + -150 = 0
0 + 5x + x2 = 0 + -150
5x + x2 = 0 + -150

Combine like terms: 0 + -150 = -150
5x + x2 = -150

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = -150 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -150 + 6.25

Combine like terms: -150 + 6.25 = -143.75
6.25 + 5x + x2 = -143.75

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = -143.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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