tolong dibantu nmr 7 dan 8 dan pakai cara yaaa:)

[tex]( 216^{\frac{1}{3}} ) ^{\frac{1}{2} }
= ( 6^{3} ^ \frac{1}{3}) ^\frac{1}{2} [/tex]
3 nya di tembak
= [tex](6) ^\frac{1}{2}
= \sqrt{6} [/tex]

[tex] \frac{8}{3+ \sqrt{5} } . \frac{3- \sqrt{5} }{3- \sqrt{5}} = \frac{8(3- \sqrt{5}) }{9-5} = \frac{8(3- \sqrt{5}) }{4} = {4(3- \sqrt{5}) [/tex]