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Q: What is bigger a -9 or a-2 mathematicaly speaking?

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a2 - 6a + 9 = a2 - 3a - 3a + 9 = a(a - 3) - 3(a - 3) = (a - 3)*(a - 3) = (a - 3)2

(a + 9)(a - 9)

a2 + 12a + 27 = (a + 3)(a + 9)

The simplest and best way is: =A1+A2 You could also do it any of the following ways: =SUM(A1:A2) =SUM(A1,A2) =SUM(A1+A2) =SUBTOTAL(9,A1,A2)

a2 - a - 72 = (a - 9)(a + 8)

(a + 9)(a - 3)

5a3-45a=-2a2+18 5a(a2-9)=-2(a2-9) 5a=-2 a=-2/5

If that's -81, there is a formula for the "difference of squares." In this case, the answer is (a + 9)(a - 9)

9 gallons is bigger.

Yes, 9 is bigger than 4.9 is.

You could do it in any of the following ways: =SUM(A1:A3) =SUM(A1, A2, A3) =SUBTOTAL(9, A1:A3) =A1 + A2 + A3

9 kilograms is bigger than 4.2 kilograms because 9 is bigger than 4.2

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