Question

simplify (3 + root 2 )(3 - root 3​

Answer 1

Answer:

answer is 7

Explaination:

$(3 + \sqrt{2} )(3 - \sqrt{2} )$

= 9 -3√2 +3√2 - 2 (we will cut -3√2 and +3√2)

= 9-2

=7(Answer)

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Answer 2

Answer:

3+√2)/(3-√2)

=(3+√2)(3+√2)/{(3-√2)(3+√2)}

This is called rationalization

(3+√2)^2/(9-2)

=(9+2+6√2)/7

=(11+6√2)/7 Ans