Question

find the product
(y-1)(y+2)​

Answer 1

Answer:

Step-by-step explanation:

find the product ( y+1)(y-2)

Answer 2

Comparing with identity four

(x+a) (x+b) = x^2 + (a+b)x + ab

y=x, a=-1 and b= 2

= y^2 + (-1+2)y + (-1×2)

=y^2 + y - 2