3x^2-18x+72=

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Solution for 3x^2-18x+72= equation:


Simplifying
3x2 + -18x + 72 = 0

Reorder the terms:
72 + -18x + 3x2 = 0

Solving
72 + -18x + 3x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(24 + -6x + x2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(24 + -6x + x2)' equal to zero and attempt to solve: Simplifying 24 + -6x + x2 = 0 Solving 24 + -6x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-24' to each side of the equation. 24 + -6x + -24 + x2 = 0 + -24 Reorder the terms: 24 + -24 + -6x + x2 = 0 + -24 Combine like terms: 24 + -24 = 0 0 + -6x + x2 = 0 + -24 -6x + x2 = 0 + -24 Combine like terms: 0 + -24 = -24 -6x + x2 = -24 The x term is -6x. Take half its coefficient (-3). Square it (9) and add it to both sides. Add '9' to each side of the equation. -6x + 9 + x2 = -24 + 9 Reorder the terms: 9 + -6x + x2 = -24 + 9 Combine like terms: -24 + 9 = -15 9 + -6x + x2 = -15 Factor a perfect square on the left side: (x + -3)(x + -3) = -15 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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