(2+5)(2+5)+(10+5)(10+5)
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5
49+ 225
274..........
274..........
Anonymous:
why
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2
(2+5)(2+5)+(10+5)(10+5)=(2+5)^2+(10+5)^2
= (2^2+2*2*5+5^2 ) +(10^2+2*10*5+5^2)
=4+20+25 +100+100+25 = 274
= (2^2+2*2*5+5^2 ) +(10^2+2*10*5+5^2)
=4+20+25 +100+100+25 = 274
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