saifoo.khan
  • saifoo.khan
The length of a diagonal of a square is "j+3" . Find the area of square.
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
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saifoo.khan
  • saifoo.khan
Ah, great! @Akpellet_math
anonymous
  • anonymous
\[(j ^{2}+6j+9) / 2\]

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saifoo.khan
  • saifoo.khan
I was half way already! :D
anonymous
  • anonymous
\[x^2 = 4 + 3j\]
anonymous
  • anonymous
its Akpellet not AKPELLET
saifoo.khan
  • saifoo.khan
lol.
anonymous
  • anonymous
\[x^2 + x^2 = (j+3)^2 \implies 2x^2 = -1 + 9 + 6j \implies x^2 = 4 + 3j\] \[x^2 = Area\]
anonymous
  • anonymous
but @waterineyesthere -1 will be j^2 as we have 2 xpand (j+3)^2.........using algebraic identity
anonymous
  • anonymous
I think I have taken -1..
anonymous
  • anonymous
\[(j+3)^2 = j^2 + 9 + 6j \implies -1 + 9 + 6j \implies 8 + 6j\]

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