Question

please give answer for this​

Answer 1

Answer:

or, 2y²-(7-6)y-21=0

or, 2y²-7y+6y-21=0

or, y(2y-7) + 3 (2y-7)=0

or,(2y-7) (y+3) Ans

Step-by-step explanation:

hope this will be helpful

Answer 2

Step-by-step explanation:

2y²-y-21=0

lhs

2y²-7y+6y-21

2y²+6y-7y-21

2y(y+3)-7(y+3)

(2y-7)(y+3)

either,

2y-7=0

2y=+7

y=7/2

or,

y+3=0

y=-3