Question

In (z +a) (z+b) if a=b= 2 then the expression becomes

a) z² +4
(b) (z+4)²
(c) z² + 2
(d) ( z+ 2)²

Please answer fast
I'll mark u brainliest​

Answer 1

Answer:

my answer is (a)

Step-by-step explanation:

(z+a) (z+b)

(z+2) (z+2)

we known that when the sign is is not the middle of the two bracket

then we put a multiply sing

(z+2)×(z+2)

=z²+2z+2z+4

=z²+4