Jika p=4×2+3×dan Q=5×-x2,maka p-2Q =

P = 4x² + 3x
Q = 5x – x²
Maka P – 2Q
= 4x² + 3x – 2(5x – x²)
= 4x² + 3x – 10x + 2x²
= 6x² – 7x