Hindi, asked by arathi9040, 1 year ago

a+2b=5 show that a+8b cube+30ab=125

Answers

Answered by adee1729

7

since
(a+2b)=5,

then

(a+2b)³=5³,

a³+8b³+3×a×2b(a+2b)=125,

a³+8b³+6ab×5=125,

then

a³+8b³+30ab=125

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