化简并求值:(m+n)^2+(m+n)(m-3n)其中m=√2,n=1o(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/14 17:50:36
化简并求值:(m+n)^2+(m+n)(m-3n)其中m=√2,n=1o(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(

化简并求值:(m+n)^2+(m+n)(m-3n)其中m=√2,n=1o(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(
化简并求值:(m+n)^2+(m+n)(m-3n)其中m=√2,n=1
o(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)o

化简并求值:(m+n)^2+(m+n)(m-3n)其中m=√2,n=1o(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(╯□╰)oo(
(m+n)²+(m+n)(m-3n)
化简:(m²+2mn+n²)+m²-3mn+mn-3n²
=2m²-2n²
=2(m²-n²)
把m=√2,n=1代入,得
2×[(√2)²-1²]
=2

结果是2