gabriella0606
gabriella0606 gabriella0606
  • 18-09-2018
  • Mathematics
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please explain why (rad x+4 plus rad 2) becomes x+6+2rad2x+8

please explain why rad x4 plus rad 2 becomes x62rad2x8 class=

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s1m1
s1m1 s1m1
  • 18-09-2018
Because (a+b)^2 = a^2+ b^2 + 2ab
So... (rad(x+4))^2 + ( rad2)^2+ 2• rad(x+4)•rad(2)= x+4+2+ 2• rad(2•(x+4))= x+8+2 rad( 2x+8)
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