Question

(3-√5)(3+2√5) solve this please​

Answer 1

Answer:

$(3-√5)(3+2√5) \\ = 3(3+2√5) - \sqrt{5} (3+2√5) \\ = 9 + 6 \sqrt{5} - 3 \sqrt{5} - 10 \\ = 3 \sqrt{5} - 1$

Answer 2

9+6√5-3√5-2(√5)2

9+3√5-2(√5)2

9+3√5-2×5

9+5√5-10

-1+3√5

3√5-1=5.708203952