Question

show that 3 is the zero of the polynomial x³ -8x²+8x+21​

Answer 1

Step-by-step explanation:

x^3 - 8x^2 + 8x + 21

put x=3 in equation

(3)^3 - 8(3)^2 + 8(3) + 21

27 - 8(9) + 24 +21

27-72+24+21

0

hence we proved that 3 is the zero of given polynomial.

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Answer 2

Step-by-step explanation:

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