Question

Find f(-2) for x^5-5x^4+3x³ + 2x²-9x-2

Answer 1

f(-2) = -120

Explanation:

f(x) = x⁵ - 5x⁴ + 3x³ + 2x² - 9x - 2

f(-2) = (-2)⁵ - 5(-2)⁴ + 3(-2)³ - 9(-2) - 2

= -32 - 5(16) + 3(-8) + 18 - 2

= -32 - 80 - 24 + 18 - 2

= -112 - 24 + 18 - 2

= -136 + 18 - 2

= -118 - 2

= -120