Question

f(x) is equals to 5x power3 +xpower 2_5x_1, g(x) is equals to x+1

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Answer 1

Answer:

f(x) = 5x³ + x² - 5x -1

x+1=0

x= -1

f(-1) = 5(-1)³ + (-1)² - 5(-1) -1

= 5(-1) + 1 +5-1

= 0