November 2018 1 160 Report
Jika p + q = 9 dan p² - q² = 4 maka p - q adalah ...

a.  \frac{4}{9}
b.  \frac{9}{4}
c.  \frac{5}{9}
d.  \frac{13}{4}

Mohon penjelasan + caranya ^_^
terima kasih
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