6,7,8 pliss... tolong pake jalan

6. 4√12 × √3 = 4√36 = 4 × 6 = 24 (B)
7. [tex] 4^{ \frac{1}{2} } .3^{2} +4 = (2 ^{2} )^{ \frac{1}{2} } .9 + 4 = (2)(9)+4 = 18 + 4 = 22 (A)[/tex]
8. [tex] \frac{2}{ \sqrt{2}-1 } . \frac{ \sqrt{2}+1 }{ \sqrt{2}+1 } = \frac{2 \sqrt{2}+2 }{2-1}=2 \sqrt{2} +2 (C) [/tex]

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