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5 November, 08:44

Completely factor the following expression 9x^2-36

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  1. 5 November, 09:17
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    Look at perfect square factoring: x²-b ⇒ (x-b) (x+b)

    √9=3

    √36=6

    √x²=x

    knowing that:

    (3x+6) (3x-6)
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