14. Jika P(x) = x^2 + 4x + 7, berapakah nilai P(-2)?
Jawab:
P(-2) = (-2)^2 + 4(-2) + 7 = 4 – 8 + 7 = 3
15. Hitunglah nilai P(2) jika P(x) = -x^3 + x^2 + 3x – 2.
Jawab:
P(2) = -2^3 + 2^2 + 3(2) – 2 = -8 + 4 + 6 – 2 = 0
16. Jika P(x) = 2x^3 – 3x^2 + x + 3, tentukan nilai P(-1).
Jawab:
P(-1) = 2(-1)^3 – 3(-1)^2 + (-1) + 3 = 2(-1) – 3 + (-1) + 3 = -2 – 3 – 1 + 3 = -3
