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f(x) = (x - 4)(x + 8) - 9
f(x) = ax² + bx + c - postać ogólna
f(x) = (x-4)(x+8) - 9 = x² + 8x - 4x - 32 - 9
f(x) = x² + 4x - 41
a = 1, b = 4, c = -41
b)
f(x) = -3(x+6)² - 4 = -3(x² + 12x + 36) - 4 = -3x² - 36x - 108 - 4
f(x) = -3x² - 36x - 112
a = -3, b = -36, c = -112