tolong pakai cara ya;)

2.
a.
[tex] = \sqrt{128} \\ = \sqrt{64 \times 2} \\ = \sqrt{64} \times \sqrt{2} \\ = 8 \sqrt{2} [/tex]
b.
[tex] = \sqrt{48} \\ = \sqrt{16 \times 3} \\ = \sqrt{16} \times \sqrt{3} \\ = 4 \sqrt{3} [/tex]
c.
[tex] = \sqrt{75} \\ = \sqrt{25 \times 3} \\ = \sqrt{25} \times \sqrt{3} \\ = 5 \sqrt{3} [/tex]

d.
[tex] = \sqrt{147} \\ = \sqrt{49 \times 3} \\ = \sqrt{49} \times \sqrt{3} \\ = 7 \sqrt{3} [/tex]