Question

(x+8) (x+9)
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Answer 1

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Answer 2

the answer is:

${x}^{2} +17x - 72$

explanation:

$(x + 8)(x + 9) \\ identity \\ (x + a)(x + b) \\ = {x}^{2} + (a + b)x + ab \\ {x}^{2} + (8 + 9)x + 8 \times 9 \\ {x}^{2} + 8x + 9x + 72 \\ {x}^{2} + 17x + 72$

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