Diketahui P(x)= 2x+1 Q(x)= x^2+3x-4. Tentukan: a) Px + Qx b) Px - Px c) Px x Qx

P(x) = 2x + 1
Q(x) = x² + 3x - 4

A. P(x) + Q(x)
= (2x + 1) + (x² + 3x - 4)
= x² + 2x + 3x + 1 - 4
= x² + 5x - 3

B. P(x) - P(x) = 0
Mungkin maksudnya
P(x) - Q(x)
= (2x + 1) - (x² + 3x - 4)
= -x² + 2x - 3x + 1 + 4
= -x² -x + 5

C. P(x) × Q(x)
= (2x + 1) (x² + 3x - 4)
= 2x³ + x² + 6x² + 3x - 8x - 4
= 2x³ + 7x² - 5x - 4