The polynomial p(x) = ax3 + 9x2 + 4z - 8, when divided by (x + 3) leaves -20
as remainder. Find the value of a.
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Answer:
x+3=0
x= -3
By remainder theorem:-
p [-3] = a(-3)^3 +9 (-3)^2 +4 (-3) -8
-20 = -27a +81 -12 -8
-20 = -27a +81 -20
-81 = -27a
a = 3
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