devanpounds11 devanpounds11

14-10-2020
Mathematics

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If f(x) = 3x2 + 2x - 2, find f(8) - f(-5)

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elliecn0313 elliecn0313

14-10-2020

Answer: 143

Step-by-step explanation:

f(8) = 3(8)^2 + 2*8 - 2 = 3*64 + 16 - 2 = 192 + 16 - 2 = 206

f(-5) = 3(-5)^2 + 2*(-5) - 2 = 3*25 + (-10) -2 = 75 - 10 - 2 = 63

f(8) - f(-5) = 206 - 63 = 143

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