Question

Verify whether the indicated numbers are zeroes of their corresponding polynomials.

(a) Q(s) = -4s^3 + 7s^2 - 24; s = -4 and 1

Answer 1

• No, incorrect

Explanation:

Given

• Q(s) = -4s^3 + 7s^2 - 24;
• s = -4 and 1

Verifying zeroes

Q(-4) =

• -4(-4)^3 + 7(-4)^2 - 24 =
• 256 + 112 - 24 =
• 344
• Incorrect as 344 ≠ 0

Q(1) =

• -4(1)^3 + 7(1)^2 - 24 =
• -12 + 7 - 24 =
• -29
• Incorrect as -29 ≠ 0