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(x + 8) (x + 9)

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Kryzta143go

(x + 8) (x + 9)

» Multiply the second parentheses by each term from the first parentheses.

• x×(x + 9) + 8 (x + 9)

» Multiply each term in the parentheses by x.

• x×x + 9x

» Calculate the product

• x² + 9x

• x² + 9x + 8(x + 9)

• 8x + 8×9

• 8×9 = 72

• » 8x + 72

» Collect the terms.

•x² + 9x + 8x + 72

•» 9 + 8 = 17x

ANSWER: x² + 17x + 72

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