Question

simplify (3-root11)(3+root11)​

Answer 1

$(3 - \sqrt{11} )(3 + \sqrt{11)} \\ \\ = {(3)}^{2} - ( { \sqrt{11)} }^{2} \\ \\ = 9 - 11 \\ \\ = - 2$

Hope it helps.

Answer 2

(3-√11)*(3+√11)

(3^2)-(√11)^2

9-11

-2