解方程或不等式: (1)(x+3)2+2(x-1)2=3x2+13. (2)(2x-5)2+(3x+1)2>13(x2-10).

问题描述:

解方程或不等式:
(1)(x+3)2+2(x-1)2=3x2+13.
(2)(2x-5)2+(3x+1)2>13(x2-10).

(1)整理得:x2+6x+9+2x2-4x+2=3x2+13,
移项合并得:2x=2,
解得:x=1;
(2)不等式整理得:4x2-20x+25+9x2+6x+1>13x2-130,
移项合并得:-14x>-156,
解得:x<11

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