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Verified answer
Diketahui:a=2b
2x²+mx+16=0
A= 2, B =m , C = 16
a×b = C/A
2b×b = 16/2
2b² = 8
b² = 4
b = 2 ----> a = 4
a+b= -B/A
2 + 4 = -m/2
6 = -m/2
12= -m
m= -12