How do you factor the expression # 9x^3 + 18x^2 + 7x + 14#?
1 Answer
Mar 8, 2016
Explanation:
'split' the expression into two groups
so [
#9x^3 + 18x^2 ] + [ 7x + 14 ]# now factorise each group
#9x^3+18x^2 = 9x^2(x+2) " and " 7x+14= 7(x+2)# there is now a common factor of (x+2) in each pair
#rArr 9x^3+18x^2+7x+14 = (x+2)(9x^2+7)#
