Question

`p(x) = x^2 - 7 sqrt 7 x + 3  "then " p(7 sqrt 7) = ?`

विकल्प

• 3

• `7sqrt7`

• `42 sqrt 7 + 3`

• `49 sqrt 7`

Answer 1

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