一道八下因式分解计算题,(x-y)(x-y-12)+36(x-y-6)²=(x-y)^2-12(x-y)+36这步是怎么来的?什么是十字相乘?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 06:38:58
![一道八下因式分解计算题,(x-y)(x-y-12)+36(x-y-6)²=(x-y)^2-12(x-y)+36这步是怎么来的?什么是十字相乘?](/uploads/image/z/2824829-53-9.jpg?t=%E4%B8%80%E9%81%93%E5%85%AB%E4%B8%8B%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E8%AE%A1%E7%AE%97%E9%A2%98%2C%EF%BC%88x-y%29%28x-y-12%29%2B36%EF%BC%88x-y-6%29%26sup2%3B%3D%28x-y%29%5E2-12%28x-y%29%2B36%E8%BF%99%E6%AD%A5%E6%98%AF%E6%80%8E%E4%B9%88%E6%9D%A5%E7%9A%84%EF%BC%9F%E4%BB%80%E4%B9%88%E6%98%AF%E5%8D%81%E5%AD%97%E7%9B%B8%E4%B9%98%EF%BC%9F)
xTmOP+)1QȢ ,aߊSd@@U1s~_ع+S}\Ҵ{9ysMnMe8A#hv`Vl:[JTv&:l*1_p q=HdĶaFXu:КJѳ=0LepQljD?Pxs<>({/Xq9[층4lj}R$[?!>Y_\s_tf
ˡlAVnQx:$O/awudRpp}"1amMJ$Fhǘvg1&wGH6Ảt)K F(Dp=0qҊnU<2+NTZJY(⬙F%Ȑ E%[41:_#Kȕ}Դ;1&_lQZkR̵iV`{0wt7
q{/RCptk 8RFQfrv'R"6eQp"CtQz"g` mTn3:IFdؕ<>F>0_eELPU