Объяснение:
f(x) = -x²+2x+15
f(2) = -2² + 2 × 2 + 15 = -4 + 4 + 15 = 15
f(-3) = -(-3)² + (-3)×2 + 15 = -9 - 6 + 15 = 0
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Объяснение:
f(x) = -x²+2x+15
f(2) = -2² + 2 × 2 + 15 = -4 + 4 + 15 = 15
f(-3) = -(-3)² + (-3)×2 + 15 = -9 - 6 + 15 = 0