How do you factor #2x^2 + 7x-4#?
1 Answer
Aug 28, 2016
Explanation:
Use an AC method:
Find a pair of factors of
The pair
Use this pair to split the middle term and factor by grouping:
#2x^2+7x-4#
#=2x^2+8x-x-4#
#=(2x^2+8x)-(x+4)#
#=2x(x+4)-1(x+4)#
#=(2x-1)(x+4)#
