y = ax²+b
y' = 2ax <= y' = 8, x = 4
8 = 2a.4
a = 1
y = x²+b <= x = 4, y = 1
1 = 4²+b
b = -15
16a = 16, 2b = -30
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y = ax²+b
y' = 2ax <= y' = 8, x = 4
8 = 2a.4
a = 1
y = x²+b <= x = 4, y = 1
1 = 4²+b
b = -15
16a = 16, 2b = -30