.5x^2+3.5x=-12

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Solution for .5x^2+3.5x=-12 equation:


Simplifying
0.5x2 + 3.5x = -12

Reorder the terms:
3.5x + 0.5x2 = -12

Solving
3.5x + 0.5x2 = -12

Solving for variable 'x'.

Reorder the terms:
12 + 3.5x + 0.5x2 = -12 + 12

Combine like terms: -12 + 12 = 0
12 + 3.5x + 0.5x2 = 0

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

Divide each side by '0.5'.
24 + 7x + x2 = 0

Move the constant term to the right:

Add '-24' to each side of the equation.
24 + 7x + -24 + x2 = 0 + -24

Reorder the terms:
24 + -24 + 7x + x2 = 0 + -24

Combine like terms: 24 + -24 = 0
0 + 7x + x2 = 0 + -24
7x + x2 = 0 + -24

Combine like terms: 0 + -24 = -24
7x + x2 = -24

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = -24 + 12.25

Reorder the terms:
12.25 + 7x + x2 = -24 + 12.25

Combine like terms: -24 + 12.25 = -11.75
12.25 + 7x + x2 = -11.75

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = -11.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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