Question

初一几道数学题(因式分解)1、计算:(14x-5+3x^2)÷(x+5)2、计算：「(m+n)^2-4(m-n)^2」÷

Answer 1

1、(14x-5+3x^2)÷(x+5) =(3x-1)(x+5)/(x+5) =3x-1 2.「(m+n)^2-4(m-n)^2」÷（3n-m) =(m+n+2m-2n)(m+n-2m+2n)/(3n-m) =(3m-n)(3n-m)/(3n-m) =3m-n