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y²+6y = 2x - 11
(y+3)²-9 = 2x-11
(y+3)² = 2x - 11 + 9
(y+3)² = 2x - 2
(y+3)² = 2(x - 1)
4p = 2
p = 1/2
fokus (1+1/2,-3) = (3/2 , -3)