Question

1 and -1 are the zeroes of the polynomial ax cube +x square-2x+b, find the values of and b

Answer 1

zeros = -1 and 1

polynomial P(x) = ax^3 +x^2-2x+b

P(-1) = a(-1)^3 + (-1)^2 -2 (-1) +b

- a +1+2+b = 0

b-a= -3

or, a-b=3

P(1) = ax1^3 + 1^2 -2x1 +b

a+b = 1

equating values a = 2 and b = -1

Answer 2

ur answer is attached above ....

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