Answer:
3(5y - 7)(8y + 7 )
Step-by-step explanation:
120y^2 – 63y – 147
Factor out a 3
3(40y^2 -21y -49)
40 = 1*40, 2*20 4*10 5*8
49 = 1*49 and 7*7
We need to play with the combinations to get -21 when added together
I will try
3(5y 7)(8y 7 )
We need the bigger one to be negative
5*7 + -8*7 = 35-56 = -21
So the 7 that multiplies by the 8 must be negative
3(5y - 7)(8y + 7 )
