解:m²-18m+80=0(m-8)(m-10)=0m-8=0,得:m=8m-10=0,得:m=10∴ m=8 或m=10
㎡-18m+80=0解:(m-8)(m-10)=0m-8=0或m-10=0m₁=8,m₂=10
㎡-18m+80=0解:(m-8)(m-10)=0解得;m1=8;m2=10