jrsecession
21.08.2019 •
Mathematics
Complete the square: a^2 - 2a - 8=0
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Ответ:
(a - 4) (a + 2) = 0
a - 4 = 0 or a + 2 = 0
a = 4 or a = -2
Ответ:
Step-by-step explanation:
A U B means all values containing in A and B.
Therefore A U B = {3,6,7,11,12,15} (C)