Question

the factorisation of 12a²b+15ab gives​

Answer 1

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$12a {}^{2} b \: + \: 15ab$

ᴛᴀᴋɪɴɢ 3ab ᴄᴏᴍᴍᴏɴ :-

$\underline{3ab \: (4a \: + \: 5) }$