Question

Factorise 9 + 6z + z²​

Answer 1

Step-by-step explanation:

z2 + 6z + 9

(z)2 + 2 × (z) × (3) + (3)2

(z+3)2

(z + 3) (z + 3)

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Answer 2

Step-by-step explanation:

This is a trinomial

sum = 6

product = 9

numbers = 3,3

9+ 3z + 3z + z^2

3(3+z) +z(3+z)

(3+z)(3+z)