Combine like terms: 2x + 3x = 5x, so the expression becomes 5x - 5.

Divide both sides by 3 to get x = 4.

This is a difference of squares: x² - 9 = (x - 3)(x + 3).

Use the difference of squares: (x + 2)(x - 2) = x² - 4.

Take the square root of both sides: x = ±4.

Multiply coefficients and variables: 2 × 3 = 6 and x × x = x².

Divide by 2: x - 3 = 5, then add 3 to both sides to get x = 8.

Substitute x = 2: f(2) = 4 + 4 = 8.

Add 10 to both sides: 5x = 10, then divide by 5 to get x = 2.