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Bezzdna [24]
3 years ago
11

Someone help me answer this plzzzzz

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
6 0

Answer:

Step-by-step explanation:

r = (x  co-efficient  ÷ 2)²

r = (6/2)² = 3²

r = 9

s = - 2r

s = -2*9 = -18

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