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प्रश्न
`p(x) = x^2 - 7 sqrt 7 x + 3 "then " p(7 sqrt 7) = ?`
पर्याय
3
`7sqrt7`
`42 sqrt 7 + 3`
`49 sqrt 7`
उत्तर
3
Explanation:
`p(x) = x^2 - 7 sqrt 7 x + 3`
`therefore p(7sqrt7)`
= `(7 sqrt 7)^2 - 7sqrt7 xx 7 sqrt 7 + 3`
= 343 - 343 + 3
= 3
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