Question

what is the expanded form :(z-6)(z+2)​

Answer 1

z ( z + 2 ) -6 ( z + 2 )

Answer 2

Here the identity that will be used is: (x+a)(x+b) = x² + (a+b)x +ab

So using that identity, we get:

z²+(-6+2)z+(-6)(2)

=z² - 4z -12