Math

-9 to the second power - (-6) to the second power

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posted by Writeacher
2. (-9)^2 - (-6)^2

is in the format of (a^2 - b^2).

(a^2 - b^2) = (a+b)(a-b)

So, (-9)^2 - (-6)^2 = (-9 + -6)(-9 - -6)
= -15 * -3
= 45

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posted by Jesin

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