Look at your room. It’s dirty(脏的). Please make it _________________. A. late B. big C. tidy D. bad 答案:C已知(x-3)2与2|y-2|互为相反数,试求++的值.
【解析】试题分析:先根据相反数的意义及偶次方和绝对值的非负性,求出x和y的值,然后把所给代数式按照同分母分式的运算法则化简,然后再点入求值.
【解析】
∵(x-3)2与2|y-2|互为相反数,
∴(x-3)2+2|y-2|=0,
∴x-3=0,y-2=0,
∴x=3,y=2,
∴++
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