Answers

2014-11-12T20:33:08+05:30
R²+20r+100 is the right answer
0
Next time add info abt the formula too :-)
2014-11-12T20:56:47+05:30
Identity=(a+b)²
(a+b)²=a²+b²+2×(a+b)

(r+10)²=
r²+10²+2×(r+10)
r²+20r+100
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