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Verified answer
A) 5x² + 6y - 7koef y = 6
b) 3x² - 4py + 2y²
koef y = - 4p
c) 2x² + 6y - 3
koef y = 6
d) 10y² + 7x - 17
koef y = -
e) - 25x² - 15y + 10
koef y = - 15