-1=0.6x^2+3x+6

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Solution for -1=0.6x^2+3x+6 equation:


Simplifying
-1 = 0.6x2 + 3x + 6

Reorder the terms:
-1 = 6 + 3x + 0.6x2

Solving
-1 = 6 + 3x + 0.6x2

Solving for variable 'x'.

Combine like terms: -1 + -6 = -7
-7 + -3x + -0.6x2 = 6 + 3x + 0.6x2 + -6 + -3x + -0.6x2

Reorder the terms:
-7 + -3x + -0.6x2 = 6 + -6 + 3x + -3x + 0.6x2 + -0.6x2

Combine like terms: 6 + -6 = 0
-7 + -3x + -0.6x2 = 0 + 3x + -3x + 0.6x2 + -0.6x2
-7 + -3x + -0.6x2 = 3x + -3x + 0.6x2 + -0.6x2

Combine like terms: 3x + -3x = 0
-7 + -3x + -0.6x2 = 0 + 0.6x2 + -0.6x2
-7 + -3x + -0.6x2 = 0.6x2 + -0.6x2

Combine like terms: 0.6x2 + -0.6x2 = 0.0
-7 + -3x + -0.6x2 = 0.0

Begin completing the square.  Divide all terms by
-0.6 the coefficient of the squared term: 

Divide each side by '-0.6'.
11.66666667 + 5x + x2 = 0

Move the constant term to the right:

Add '-11.66666667' to each side of the equation.
11.66666667 + 5x + -11.66666667 + x2 = 0 + -11.66666667

Reorder the terms:
11.66666667 + -11.66666667 + 5x + x2 = 0 + -11.66666667

Combine like terms: 11.66666667 + -11.66666667 = 0.00000000
0.00000000 + 5x + x2 = 0 + -11.66666667
5x + x2 = 0 + -11.66666667

Combine like terms: 0 + -11.66666667 = -11.66666667
5x + x2 = -11.66666667

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 = -11.66666667 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -11.66666667 + 6.25

Combine like terms: -11.66666667 + 6.25 = -5.41666667
6.25 + 5x + x2 = -5.41666667

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = -5.41666667

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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