ln(3x)=ln(x^2-18)

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Solution for ln(3x)=ln(x^2-18) equation:


Simplifying
ln(3x) = ln(x2 + -18)

Remove parenthesis around (3x)
ln * 3x = ln(x2 + -18)

Reorder the terms for easier multiplication:
3ln * x = ln(x2 + -18)

Multiply ln * x
3lnx = ln(x2 + -18)

Reorder the terms:
3lnx = ln(-18 + x2)
3lnx = (-18 * ln + x2 * ln)
3lnx = (-18ln + lnx2)

Solving
3lnx = -18ln + lnx2

Solving for variable 'l'.

Move all terms containing l to the left, all other terms to the right.

Add '18ln' to each side of the equation.
18ln + 3lnx = -18ln + 18ln + lnx2

Combine like terms: -18ln + 18ln = 0
18ln + 3lnx = 0 + lnx2
18ln + 3lnx = lnx2

Add '-1lnx2' to each side of the equation.
18ln + 3lnx + -1lnx2 = lnx2 + -1lnx2

Combine like terms: lnx2 + -1lnx2 = 0
18ln + 3lnx + -1lnx2 = 0

Factor out the Greatest Common Factor (GCF), 'ln'.
ln(18 + 3x + -1x2) = 0

Factor a trinomial.
ln((6 + -1x)(3 + x)) = 0

Subproblem 1

Set the factor 'ln' equal to zero and attempt to solve: Simplifying ln = 0 Solving ln = 0 Move all terms containing l to the left, all other terms to the right. Simplifying ln = 0 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 0 Move all terms containing l to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Add 'x' to each side of the equation. -1x + x = -6 + x Combine like terms: -1x + x = 0 0 = -6 + x Simplifying 0 = -6 + x The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 3

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing l to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Add '-1x' to each side of the equation. x + -1x = -3 + -1x Combine like terms: x + -1x = 0 0 = -3 + -1x Simplifying 0 = -3 + -1x 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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