Answer:
4.
f(x) = (x + 2)(x + 1)(x - 3) = x^3 - 7·x - 6
a = 0 ; b = -7 ; c = -6
5.
a = -3 ∧ b = -2 ∧ c = -3
the radius is 10
the diameter is 20
the circumfrence is 62.8
the area is 314
Hope this helps.
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Step-by-step explanation: