Question

(3+root3) (3-root3)​

Answer 1

Answer:

6

Step-by-step explanation:

$(3 + \sqrt{3} )(3 - \sqrt{3}) \\ (3 \times 3) + (3 \times - \sqrt{3}) + ( \sqrt{3} \times 3 ) + ( \sqrt{3} \times - \sqrt{3} ) \\ 9 + ( - 3 \sqrt{3} ) + 3 \sqrt{3} + ( - 3) \\ 9 - 3 \sqrt{3} + 3 \sqrt{3} - 3 \\ 9 - 3 \\ 6$