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प्रश्न
Expand : `( 3a + 2/b )( 2a - 3/b )`
उत्तर
`( 3a + 2/b )( 2a - 3/b) = (3a)(2a) + ( 2/b )(2a) - (3/b)(3a) - (2/b)(3/b)`
= `6a^2 + ( 4/b - 9/b )a - 6/b^2`
= `6a^2 + (-5/b)a - 6/b^2`
= `6a^2 - [5a]/b - 6/b^2`
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