Mathematics: What is the complete factorization of r2 - 6r - 9s2 + 9? a) (r - 3 + 3s)(r - 3 - 3s) b) (r + 3 + 3s)(r - 3 - 3s) c) (r - 3 + 3s)(r - 3 + 3s)

What is the complete factorization of r2 - 6r

Ответ:

teFazoe9550

13.03.2022

$r^2-6r-9s^2+9=r^2-6r+9-9s^2=r^2-2\cdot r\cdot3+3^2-9s^2\\\\\text{use}\ (a-b)^2=a^2-2ab+b^2\\\\=(r-3)^2-9s^2=(r-3)^2-(3s)^2\\\\\text{use}\ a^2-b^2=(a-b)(a+b)\\\\=(r-3-3s)(r-3+3s)\to A$

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Ответ:

ronaldo22

04.04.2023

Mathematics

It's 78π inches so probably d.

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What is the complete factorization of r2 - 6r - 9s2 + 9? a) (r - 3 + 3s)(r - 3 - 3s) b) (r + 3 + 3s)(r - 3 - 3s) c) (r - 3 + 3s)(r - 3 + 3s)

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