1
P(x)+Q(x)=3x²-10x+4+3x²=6x²-10x+4
P(x)-Q(x)=3x²-10x+4-3x²=-10x+4
P(x)*Q(x)=(3x²-10x+4)*3x²=9x^4-30x³+12x²
p(x):Q(x)=(3x²-10x+4):3x²=1-(10x-4)/3x²
2
P(x)+Q(x)=3x³+6x+2+x²+1=3x³+x²+6x+3
P(x)-Q(x)=3x³+6x+2-x²-1=3x³-x²+6x+1
P(x)*Q(x)=(3x³+6x+2)*(x²+1)=3x^5+6x³+3x²+6x+2=3x^5+9x²+6x+2
P(x):Q(x)=(3x³+6x+2):(x²+1)=3x+(3x+2)/(x²+1)