Answer:
f(x) = -x² + 8x - 11
f(-4) = -(-4)² + 8(-4) - 11
= -16 - 32 - 11
= -59
f(1) = -1² + 8(1) - 11
= -1 + 8 - 11
= -4
f(-4) - f(1) = -59 - (-4) = -59 + 4 = -55
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