mathmath333
  • mathmath333
question
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Loser66
  • Loser66
Typo is there, right? x =332, y = 333, not x =333, right?
mathmath333
  • mathmath333
good catch
mathmath333
  • mathmath333
\(\large \color{black}{\begin{align} & \text{If}\ x=332,\ y=333,\ z=335 \hspace{.33em}\\~\\ & \text{then}\ (x^{3}+y^{3}+z^{3}-3xyz) \ \text{is equal to}\hspace{.33em}\\~\\~\\ & a.)\ 9000 \hspace{.33em}\\~\\ & b.)\ 10000 \hspace{.33em}\\~\\ & c.)\ 7000 \hspace{.33em}\\~\\ & d.)\ 8000 \hspace{.33em}\\~\\ \end{align}}\) I have to solve this within a minute

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More answers

Loser66
  • Loser66
Let's wait for @imqwerty
imqwerty
  • imqwerty
a^3 + b^3 + c^3 – 3abc = (a+b+c)((a-b)^2 + (b-c)^2 + (c-a)^2) /2 use this
mathmath333
  • mathmath333
wow how did he get that thing
mathmath333
  • mathmath333
the traditional method may take an hour
mathmath333
  • mathmath333
or their might be some other trick using \(y=x+1,z=x+2\)
Loser66
  • Loser66
What is the traditional method?
mathmath333
  • mathmath333
(traditional method)putting all those values and calculating
imqwerty
  • imqwerty
a^3 + b^3 +c^3 = (a+b+c)(a^2 +b^2 +c^2 -ab -bc -ca) =(a+b+c)(a^2 +a^2 +b^2 +b^2 +c^2 +c^2 -2ab-2bc-2ca)/2 did u get it now
mathmath333
  • mathmath333
yes i always forget the formula within 2 days

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