Posted by mysterychicken on Saturday, June 12, 2010 at 11:29am.
30. If we factorise x^2 - 6x + 9, we get (x-3)^2.
So the perimeter is 4(x-3) = 4x -12
I'll need to figure out the others yet in a minute.
Wouldn't the perimeter be 4(x-3)^2?
Why? x-3 is the length of ONE side. To calculate
the perimeter of a square, the 4 identical sides are added. But maybe I'm wrong, I dunno....why do you want to square it?
Jazzie, you're correct. Thanks
-MC
30. 4x-12 is correct
33. You probably meant to type
k^2 + kf - 2f^2 which is
=(k+2f)(k-f)
38.
Amount = 2000(1.02)^32
= .....
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