Math, asked by anshidababy61, 1 day ago

(3а + 2b) in the expansion coefficient of ab is..?

Answers

Answered by krishpmlak

0

Answer:

Step-by-step explanation:

Given that,

( 3a + 2b )²

= ( 3a )² + 2 ( 3a ) ( 2b ) + ( 2b )² [∵( a + b )² = a² + 2ab + b² ]

= 9a² + 12ab + 4b²

∴The coefficient of ab in the expansion is 12.

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