Question

factorise: z(z-2)+2(z-2)​

Answer 1

Answer:

z^2 - 4

Step-by-step explanation:

z^2 - 2z +2z -4

z^2 - 4

if z^2 - 4 =0

then z = plus or minus 2

Answer 2

Answer:

z^2 - 4

Step-by-step explanation:

z^2 - 2z +2z -4

z^2 - 4

if z^2 - 4 =0

then z = plus or minus 2