(6x³+3x²y):х²+(-10xy+15y²):(5у)=6х+3у-2х+3у=4х+6у=4*2+6*(-5)=-22.
2x*(x-21)²-x²*(x-21)=0
x*(x-21)*(2*(x-21)-x)=0
x*(x-21)*(2x-42-x)=0
x*(x-21)*(x-42)=0
x₁=0 x₂=21 x₃=42.
(22,5k³u³-1,5k²u⁴+7,5ku⁵)/(2,5ku³)=9k²-0,6ku+3u².
3'10 * 3'-8 = 3'2
10'-3 : 10'-5 = 10'2
(2'-3)'-1 = 2'3
11'15 * 11'-13= 11'2
4'5 * 16'-3= 4'5 * 4'2'-3= 4'-1