Aljabar No 1 a,b,c,d,e

a. 12x³+4x²-2x²
=12x³+2x²

b. X²+5x+6-x+2
=x²+4x+8

c. 2x²-x-10-x+2
=2x²-12

d. 2x³+7x²-14x-40-2x-5
=2x³+7x²-12x-35

e. 3x³-4x²-5x+6-x+2
=3x3-4x²-4x+8
Maaf kali salah ^_^