2 years ago

Perfect square trinomial:

Mathematics

1 answer:

Alina [70]2 years ago

6 0

Answer:

See work below.

Step-by-step explanation:

$(k-9)^2=(k-9)(k-9)\\=k^2-2(k)(9)+9^2\\=k^2-18k+81$

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Given that,

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2 years ago

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