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23 October, 19:28

Is 36z^2 - 9 a difference of squares?

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  1. 23 October, 21:11
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    yes

    Step-by-step explanation:

    A difference of squares has the form a² - b² = (a - b) (a + b)

    note that 36z² = (6z) ² ⇒ a = 6z and 9 = 3² ⇒ b = 3

    36z² - 9 is a difference of squares and factors as (6z - 3) (6z + 3)
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