Please help me solve this...

3(x-2)(x+6)

Thanks

3(x-2)(x+6)

since we want to expand this, we can use the FOIL method: multiply the FIRST terms of each expression inside the parenthesis (x and x), OUTER terms (x and 6), INNER terms (-2 and x) and LAST terms (-2 and 6), and we add the products. therefore,
3*(x*x + x*6 + (-2)*x + (-2)*6)
3*(x^2 + 6x - 2x - 12)
3*(x^2 + 4x - 12)
3x^2 + 12x - 36

hope this helps~ :)