А²+5а+6 / а²+6а+9=(а+2)(а+3) / (a+3)²=
=(a+2) / (a+3)
а²+5а+6=0
D=25-4*6=25-24=1
a= (-5+1)2= -4/2= -2
а=(-5-1)/2= -6/2= -3
а²+5а+6=(а+2)(а+3)
а²+6а+9=(a+3)²
5a²-9a-2 / a²-3a+2= (5a+1)(a-2) / (a-1)(a-2)=
=(5a+1) / (a-1)
5a²-9a-2=0
D=81-4*5*(-2)=121
a=(9+11) /2*5=20/10=2
a=(9-11)/10= -2/10= -0,2
5a²-9a-2=5(a+0,2)(a-2)=(5a+1)(a-2)
a²-3a+2=0
D=9-4*2=1
a= (3-1)/2=2/2=1
a=(3+1)/2=4/2=2
a²-3a+2=(a-1)(a-2)
m³-m²+m-1 / m²-2m+1= (m-1)(m²+1) / (m-1)²=
=(m²+1) / (m-1)
m³-m²+m-1=(m³-m²)+(m-1)=m²(m-1)+(m-1)=
=(m-1)(m²+1)
m²-2m+1=(m-1)²