Answer:
(4x−3)(3x+5)=0
Explanation:
Find two numbers whose product is the leading coefficient times the last term and whose sum is the middle coefficient.
ac=−180 b=11
The numbers are −9 and 20.
Rewrite the middle term.
12x2−9x+20x−15=0
Factor by grouping.
3x(4x−3)+5(4x−3)=0
(4x−3)(3x+5)=0