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प्रश्न
Multiply: `2"x"+1/2"y"` and `2"x"-1/2"y"`
बेरीज
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उत्तर
`(2"x"+1/2"y")(2"x"-1/2"y")`
= `2"x"(2"x"-1/2"y")+1/2"y"(2"x"-1/2"y")`
= `4"x"^2-"xy"+"xy"-1/4"y"^2`
= `4"x"^2-1/4"y"^2`
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