Question

plz its urgent

z+1 ,z-1 , y+ 17 , y-17 how the expression have been formed?

Answer 1

Step-by-step explanation:

(z+1 )(z-1)(y+17)(y-17)

we will use the identity in z

$a {}^{2} - b {}^{2}$

which is ( a+b) (a-b)

in z it will be

z2 its sq.

z2 -12(its not twelve its sq.)

this is the same you can use the same identity in y