tolong bantu di jawab! memakai cara!!
Penjelasan dengan langkah-langkah:
a. p . q = (5,-4).(3,8) = (15,-32)
b. p . r = (5,-4).(-2,6) = (-10,-24)
c. p . (q - r) = (5,-4).((3,8)-(-2,6)) = (5,-4).(5,2) = (25,-8)
d. (p - q) . r = ((5,-4)-(3,8)).(-2,6) = (2,-12).(-2,6) = (-4,-72)
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