Perfect square trinomial:

Mathematics

1 answer:

Dennis_Churaev [7]3 years ago

3 0

Answer:

k² - 18k + 81

Step-by-step explanation:

Using the given model then

(k - 9)² with a = k and b = 9

= k² - 2(k)(9) + 9²

= k² - 18k + 81

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