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प्रश्न
Expand : `( 2x - 1/x )( 3x + 2/x )`
उत्तर
`( 2x - 1/x )( 3x + 2/x )`
= `2x( 3x + 2/x ) - 1/x( 3x + 2/x )`
= `6x^2 + 2x xx2/x-1/x xx3x-1/x xx2/x`
= `6x^2+4-3-2/x^2`
= `6x^2 + 1 - 2/x^2`
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