Question

factories the following by splitting the middle term z^2 +11z+18​

Answer 1

Explanation:

$z^2 + 11z + 18$

$= z^2 + 2z + 9z + 18$

$=z(z+2)+9(z+2)$

$=(z+2)(z+9)$

Answer: (z+2)(z+9)

I hope this answer helps. :D