Question

Find the (y +9) (y-9) product

Answer 1

Answer:

(y + 9)(y - 9) = y² - 81

Step-by-step explanation:

We have,

(y + 9)(y - 9)

Using the identity,

(a + b)(a - b) = a² - b²

(y + 9)(y - 9) = y² - 9²

(y + 9)(y - 9) = y² - 81

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