f(3)=-(3)^2-(3)+12=-9-3+12=0
f(5)=-(5)^2-(5)+12=-25-5+12=-18
b)
6= - k²- k +12
k²+k -6=0
D=1+24=25
k₁=(-1-5)/2=-3; k₂=(-1+5)/2=2
О т в е т. -3; 2
a)f(3)=-(3)^2-(3)+12=-9-3+12=0
b) 6= - k²- k +12
f(3)=-(3)^2-(3)+12=-9-3+12=0
f(5)=-(5)^2-(5)+12=-25-5+12=-18
b)
6= - k²- k +12
k²+k -6=0
D=1+24=25
k₁=(-1-5)/2=-3; k₂=(-1+5)/2=2
О т в е т. -3; 2
a)f(3)=-(3)^2-(3)+12=-9-3+12=0
f(5)=-(5)^2-(5)+12=-25-5+12=-18
b) 6= - k²- k +12
k²+k -6=0
D=1+24=25
k₁=(-1-5)/2=-3; k₂=(-1+5)/2=2
О т в е т. -3; 2