Obtain all zeros of f(x)= x3 + 13x2 + 32x + 20, if one of it's zero is -2

Answer 1

using either long division by (x+2) or by synthetic division it is easy to show that
f(x)= x3 + 13x2 + 32x + 20
is
f(x) = (x+2)(x^2 + 11x + 10) , then
f(x) = (x+2)(x+10)(x+1)

so the zeros are -2, -10 and -1

Answer 2

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Answer 3

If alpha and beta are zeros of the quadratic polynomial x square - 6 X + a, find the value of a if 3 alpha + 2 equal to 20

Answer 4

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