Question

factorise using identities z²+5z+4​

Answer 1

Answer:

z^2 + 5z + 4

(z)^2 + (4+1)z + 4(1)

(z+4)(z+1) [ Identity (x+a)(x+b) = x^2 + (a+b)x + ab]

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Answer 2

Answer:

(z+4)(z+1).

solution is in attachment