3x-9=3x(x+2)

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Solution for 3x-9=3x(x+2) equation:


Simplifying
3x + -9 = 3x(x + 2)

Reorder the terms:
-9 + 3x = 3x(x + 2)

Reorder the terms:
-9 + 3x = 3x(2 + x)
-9 + 3x = (2 * 3x + x * 3x)
-9 + 3x = (6x + 3x2)

Solving
-9 + 3x = 6x + 3x2

Solving for variable 'x'.

Combine like terms: 3x + -6x = -3x
-9 + -3x + -3x2 = 6x + 3x2 + -6x + -3x2

Reorder the terms:
-9 + -3x + -3x2 = 6x + -6x + 3x2 + -3x2

Combine like terms: 6x + -6x = 0
-9 + -3x + -3x2 = 0 + 3x2 + -3x2
-9 + -3x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-9 + -3x + -3x2 = 0

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

Ignore the factor -3.

Subproblem 1

Set the factor '(3 + x + x2)' equal to zero and attempt to solve: Simplifying 3 + x + x2 = 0 Solving 3 + x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-3' to each side of the equation. 3 + x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x + x2 = 0 + -3 x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 x + x2 = -3 The x term is x. 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. x + 0.25 + x2 = -3 + 0.25 Reorder the terms: 0.25 + x + x2 = -3 + 0.25 Combine like terms: -3 + 0.25 = -2.75 0.25 + x + x2 = -2.75 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -2.75 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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