2x-3x(x+2)=15

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Solution for 2x-3x(x+2)=15 equation:


Simplifying
2x + -3x(x + 2) = 15

Reorder the terms:
2x + -3x(2 + x) = 15
2x + (2 * -3x + x * -3x) = 15
2x + (-6x + -3x2) = 15

Combine like terms: 2x + -6x = -4x
-4x + -3x2 = 15

Solving
-4x + -3x2 = 15

Solving for variable 'x'.

Reorder the terms:
-15 + -4x + -3x2 = 15 + -15

Combine like terms: 15 + -15 = 0
-15 + -4x + -3x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(15 + 4x + 3x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(15 + 4x + 3x2)' equal to zero and attempt to solve: Simplifying 15 + 4x + 3x2 = 0 Solving 15 + 4x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 5 + 1.333333333x + x2 = 0 Move the constant term to the right: Add '-5' to each side of the equation. 5 + 1.333333333x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + 1.333333333x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 1.333333333x + x2 = 0 + -5 1.333333333x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 1.333333333x + x2 = -5 The x term is 1.333333333x. Take half its coefficient (0.6666666665). Square it (0.4444444442) and add it to both sides. Add '0.4444444442' to each side of the equation. 1.333333333x + 0.4444444442 + x2 = -5 + 0.4444444442 Reorder the terms: 0.4444444442 + 1.333333333x + x2 = -5 + 0.4444444442 Combine like terms: -5 + 0.4444444442 = -4.5555555558 0.4444444442 + 1.333333333x + x2 = -4.5555555558 Factor a perfect square on the left side: (x + 0.6666666665)(x + 0.6666666665) = -4.5555555558 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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