1) =(a³-2a²)+(18-9a)=a²(a-2)-9(a-2)=(a-2)(a²-9)=(a-2)(a-3)(a+3)
2) =a²b²(a³+27b³)=a²b²(a+3b)(a²-3ab+9b²)
1) 1/4x²=0,16
x²=0,16*4
x²=0,64
x₁=0,8
x₂=-0.8
1) =a²+6a+9
2) =4x²+4xy+y²
3) =25b²-16x²
1) =4a²-8a-a²+8a-16=3a²-16
2) =2b²+4b+2-4b=2b²+2
1) =(x-5)(x+5)
2) =a(b²-c²)=a(b-c)(b+c)
3) =-3(a²+2ab+b²)=-3(a+b)²=-3(a+b)(a+b)
1) =y⁴-4y³+4y²-y⁴+9y²+4y³+10y=13y²+10y