6x(-3x+3)+6=21

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Solution for 6x(-3x+3)+6=21 equation:


Simplifying
6x(-3x + 3) + 6 = 21

Reorder the terms:
6x(3 + -3x) + 6 = 21
(3 * 6x + -3x * 6x) + 6 = 21
(18x + -18x2) + 6 = 21

Reorder the terms:
6 + 18x + -18x2 = 21

Solving
6 + 18x + -18x2 = 21

Solving for variable 'x'.

Reorder the terms:
6 + -21 + 18x + -18x2 = 21 + -21

Combine like terms: 6 + -21 = -15
-15 + 18x + -18x2 = 21 + -21

Combine like terms: 21 + -21 = 0
-15 + 18x + -18x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-5 + 6x + -6x2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-5 + 6x + -6x2)' equal to zero and attempt to solve: Simplifying -5 + 6x + -6x2 = 0 Solving -5 + 6x + -6x2 = 0 Begin completing the square. Divide all terms by -6 the coefficient of the squared term: Divide each side by '-6'. 0.8333333333 + -1x + x2 = 0 Move the constant term to the right: Add '-0.8333333333' to each side of the equation. 0.8333333333 + -1x + -0.8333333333 + x2 = 0 + -0.8333333333 Reorder the terms: 0.8333333333 + -0.8333333333 + -1x + x2 = 0 + -0.8333333333 Combine like terms: 0.8333333333 + -0.8333333333 = 0.0000000000 0.0000000000 + -1x + x2 = 0 + -0.8333333333 -1x + x2 = 0 + -0.8333333333 Combine like terms: 0 + -0.8333333333 = -0.8333333333 -1x + x2 = -0.8333333333 The x term is -1x. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1x + 0.25 + x2 = -0.8333333333 + 0.25 Reorder the terms: 0.25 + -1x + x2 = -0.8333333333 + 0.25 Combine like terms: -0.8333333333 + 0.25 = -0.5833333333 0.25 + -1x + x2 = -0.5833333333 Factor a perfect square on the left side: (x + -0.5)(x + -0.5) = -0.5833333333 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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