kk tolong dijawab secepatnya pake jalan krn bsk mau dikumpul pliss bgt kk

1.
[tex] \frac{9}{ 3\sqrt{2} } \times \frac{3 \sqrt{2} }{3 \sqrt{2} } \\ = \frac{9(3 \sqrt{2}) }{9 \times 4} \\ = \frac{9(3 \sqrt{2}) }{36} \\ = \frac{1}{4} 3 \sqrt{2} \\ [/tex]
2.
[tex]2 \sqrt{5} - 3 \sqrt{20} + \sqrt{5} \\ = 2 \sqrt{5} - 3 \sqrt{4 \times 5} + \sqrt{5} \\ = 2 \sqrt{5 } - 3 \times 2 \sqrt{5} + \sqrt{5} \\ = 2 \sqrt{5} - 6 \sqrt{5 } - \sqrt{5} \\ = - 3 \sqrt{5} [/tex]
3.
[tex]3 \sqrt{8} \times \sqrt{6} \\ = 3 \sqrt{48} \\ = 3 \sqrt{16 \times 3} \\ = 3 \times 4 \sqrt{3} \\ = 12 \sqrt{3} [/tex]