问题
填空题
在(x-y)(x+y)=ax2+bxy-y2中,a= ,b= .
答案
∵(x-y)(x+y)=x2-y2,(x-y)(x+y)=ax2+bxy-y2,
∴x2-y2=ax2+bxy-y2,
∴a=1,b=0.
在(x-y)(x+y)=ax2+bxy-y2中,a= ,b= .
∵(x-y)(x+y)=x2-y2,(x-y)(x+y)=ax2+bxy-y2,
∴x2-y2=ax2+bxy-y2,
∴a=1,b=0.