Question

bantuu kakkk plissssss​

Answer 1

Jawab:

[tex]a*b=(\frac{2\sqrt{3} }{5} +\sqrt{5} )(3\sqrt{5} -\sqrt{3} )[/tex]

[tex]=\frac{6\sqrt{15} }{5} -\frac{2\sqrt{9} }{5} +3\sqrt{25} -\sqrt{15}[/tex]

[tex]=\frac{6\sqrt{15} }{5} -\frac{2(3) }{5} +3(5)-\sqrt{15}[/tex]

[tex]=\frac{6\sqrt{15} }{5} -\frac{6 }{5} +15-\sqrt{15}[/tex]

[tex]=\frac{6}{5} (\sqrt{15} -1)+15-\sqrt{15}[/tex]

Semoga dapat membantu :)