How do you factor by grouping #63n^3 + 54n^2 - 105n - 90#?
1 Answer
May 10, 2018
Explanation:
#"take out a "color(blue)"common factor "3#
#=3(21n^3+18n^2-35n-30)#
#=3(color(red)(3n^2)(7n+6)color(red)(-5)(3n+6))#
#=3((7n+6)(color(red)(3n^2-5)))#
#=3(7n+6)(3n^2-5)#
