Soal Berupa Lampiran yah Kak -> Pakai Cara Makasih...

Penyelesaian:

14. Ingat: a^m . a^n = a^m+n
a^m / a^n = a^m-n
[tex] \frac{a^-5 . b^3}{a^-1 . b^4} . \frac{a^2 . b^4}{a^-3 . b^-1} [/tex]
= a^(-5+2+1+3) . b^(3+4-4+1)
= [tex]ab^4[/tex]  (A).

15. [tex]( \frac{1}{9})^x = 27 [/tex]
= [tex]( \frac{1}{3^2})^x = 3^3 [/tex]
= [tex]3^-2x = 3^3[/tex]
= -2x = 3
x = -3/2 
x = -1,5  (C).

16. [tex] \sqrt{32} - 5 \sqrt{8} + 3 \sqrt{2} [/tex]
= [tex] \sqrt{16.2} - 5 \sqrt{4.2} + 3 \sqrt{2} [/tex]
= [tex]4 \sqrt{2} - 10 \sqrt{2} + 3 \sqrt{2}[/tex]
= [tex]-3 \sqrt{2}[/tex]  (D).

17. Ingat: (a + b)(a - b) = a² - b²
[tex](5 + \sqrt{8})(5 - \sqrt{8} ) [/tex]
= 25 - 8 
= 17  (A).

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