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3 years ago

8

Factor the polynomial below completely. z^2 + 9z + 20

1 answer:

PSYCHO15rus [73]3 years ago

5 0

Answer:

Step-by-step explanation:

z^2+9z+20

=z^2+(5+4)z+20

=z^2+5z+4z+20

=z(z+5)+4(z+5)

=(z+5)(z+4)

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