F (x) = 3x² + 2x + 5 dan g (x) = 10x² + x - 4 tentukan a. F (x) + g (x) b. F(x) - g (x) c. F(x) x g (x)

f(x)+g(x)=3x²+2x+5+10x²+x-4=13x²+3x+1
f(x)-g(x)=(3x²+2x+5)-(10x²+x-4)=-7x²+x+9
f(x)×g(x)=(3x²+2x+5)(10x²+x-4)=30x⁴+3x³-12x²+20x³+2x²-8x+50x²+5x-20=30x⁴+23x³+40x²-3x-20