How do you factor completely #6x^2 + x - 15#?
1 Answer
Mar 11, 2016
#6x^2+x-15=(3x+5)(2x-3)#
Explanation:
Use an AC method: Look for two factors of
The pair
Then use that pair to split the middle term and factor by grouping:
#6x^2+x-15#
#=6x^2-9x+10x-15#
#=(6x^2-9x)+(10x-15)#
#=3x(2x-3)+5(2x-3)#
#=(3x+5)(2x-3)#