x的平方减x=2怎么解
x\u7684\u5e73\u65b9\u52a02x\u51cf2 \u7684\u89e3\u4f60\u597d\uff01
\u89e3\uff1ax^2+2x-2=0
x^2+2x+1-3=0
(x+1)^2=3
x+1=-\u6839\u53f73
\u6216 x+1=\u6839\u53f73
x=-\u6839\u53f73-1
\u6216 x=\u6839\u53f73-1
\u5982\u679c\u672c\u9898\u6709\u4ec0\u4e48\u4e0d\u660e\u767d\u53ef\u4ee5\u8ffd\u95ee\uff0c\u5982\u679c\u6ee1\u610f\u8bf7\u70b9\u51fb\u53f3\u4e0a\u89d2\u597d\u8bc4\u5e76\u201c\u91c7\u7eb3\u4e3a\u6ee1\u610f\u56de\u7b54\u201d
\u5982\u679c\u6709\u5176\u4ed6\u95ee\u9898\u8bf7\u91c7\u7eb3\u672c\u9898\u540e\uff0c\u53e6\u5916\u53d1\u5e76\u70b9\u51fb\u6211\u7684\u5934\u50cf\u5411\u6211\u6c42\u52a9\uff0c\u7b54\u9898\u4e0d\u6613\uff0c\u8bf7\u8c05\u89e3\uff0c\u8c22\u8c22\u3002
\uff0c \u4f60\u7684\u91c7\u7eb3\u662f\u6211\u670d\u52a1\u7684\u52a8\u529b\u3002
\u795d\u5b66\u4e60\u8fdb\u6b65\uff01
x^-x-2=0
(x-2)(x+1)=0
所以x-2=0
或x+1=0
x=2或x=-1
首先说明符号“^”表示乘方
x^2-x=2
x^2-x-2=0
(x-2)(x+1)=0
x=2或x=-1
=(x-2)(x+1)=0
x=2,x=-1
(x-2)(x+1)=0
x=2或x=-1
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