anonymous
  • anonymous
find the square. (6m+7)^2
Mathematics
chestercat
  • chestercat
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tkhunny
  • tkhunny
Find this: \(67^{2}\) Don't use a calculator.
anonymous
  • anonymous
okay
anonymous
  • anonymous
4,489 @tkhunny

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tkhunny
  • tkhunny
Did you use a calculator?
anonymous
  • anonymous
these are the choices they gave me A) 36m^2 - 84m + 49 B) 36m^2 + 84m - 49 C) 36m^2 + 42m - 49 D) 36m^2 + 84m + 49
anonymous
  • anonymous
No pencil and paper @tkhunny
steve816
  • steve816
@tkhunny I don't understand what the point of doing 67^2 was?
steve816
  • steve816
the square is just (6m+7)(6m+7)
steve816
  • steve816
Now you just have to FOIL it!
steve816
  • steve816
|dw:1440129633355:dw|
tkhunny
  • tkhunny
I was hoping you might see what the "10" did in your multiplication. 67 = 6*10 + 7 \(67^{2} = (6*10 + 7)^{2}\) And we see that what you just did with pencil and paper is EXACTLY what you should be doing for \((6m+7)^{2}\)
steve816
  • steve816
|dw:1440129791027:dw| Answer is D
tkhunny
  • tkhunny
|dw:1440129903466:dw|

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