在(x-y)(x+y)=ax2+bxy-y2中,a= ,b= .
题型:填空题难度:一般来源:不详
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. |
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