15x-10x^2-15=0

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Solution for 15x-10x^2-15=0 equation: 


Simplifying
15x + -10x2 + -15 = 0

Reorder the terms:
-15 + 15x + -10x2 = 0

Solving
-15 + 15x + -10x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '5'.
5(-3 + 3x + -2x2) = 0

Ignore the factor 5.

Subproblem 1
Set the factor '(-3 + 3x + -2x2)' equal to zero and attempt to solve:

Simplifying
-3 + 3x + -2x2 = 0

Solving
-3 + 3x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
1.5 + -1.5x + x2 = 0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + -1.5x + -1.5 + x2 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + -1.5x + x2 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + -1.5x + x2 = 0 + -1.5
-1.5x + x2 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
-1.5x + x2 = -1.5

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = -1.5 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = -1.5 + 0.5625

Combine like terms: -1.5 + 0.5625 = -0.9375
0.5625 + -1.5x + x2 = -0.9375

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = -0.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.

The solution to this equation could not be determined.

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