5x^2+15=3x-3

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Solution for 5x^2+15=3x-3 equation:


Simplifying
5x2 + 15 = 3x + -3

Reorder the terms:
15 + 5x2 = 3x + -3

Reorder the terms:
15 + 5x2 = -3 + 3x

Solving
15 + 5x2 = -3 + 3x

Solving for variable 'x'.

Reorder the terms:
15 + 3 + -3x + 5x2 = -3 + 3x + 3 + -3x

Combine like terms: 15 + 3 = 18
18 + -3x + 5x2 = -3 + 3x + 3 + -3x

Reorder the terms:
18 + -3x + 5x2 = -3 + 3 + 3x + -3x

Combine like terms: -3 + 3 = 0
18 + -3x + 5x2 = 0 + 3x + -3x
18 + -3x + 5x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
18 + -3x + 5x2 = 0

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

Divide each side by '5'.
3.6 + -0.6x + x2 = 0

Move the constant term to the right:

Add '-3.6' to each side of the equation.
3.6 + -0.6x + -3.6 + x2 = 0 + -3.6

Reorder the terms:
3.6 + -3.6 + -0.6x + x2 = 0 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + -0.6x + x2 = 0 + -3.6
-0.6x + x2 = 0 + -3.6

Combine like terms: 0 + -3.6 = -3.6
-0.6x + x2 = -3.6

The x term is -0.6x.  Take half its coefficient (-0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
-0.6x + 0.09 + x2 = -3.6 + 0.09

Reorder the terms:
0.09 + -0.6x + x2 = -3.6 + 0.09

Combine like terms: -3.6 + 0.09 = -3.51
0.09 + -0.6x + x2 = -3.51

Factor a perfect square on the left side:
(x + -0.3)(x + -0.3) = -3.51

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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