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先化简,再求值:,其中a=-1。-八年级数学
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先化简再计算:,其中x=3,y=2。-九年级数学
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阅读下列材料,然后回答问题。在进行二次根式去处时,我们有时会碰上如,一样的式子,其实我们还可以将其进一步化简:;(一)(二)(三)以上这种化简的步骤叫做分母有理化。还可-九年级数学
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请先将式子÷化简后,再从1,2,15三个数中选择一个你最喜欢的作为x的值代入求值。-八年级数学
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请从下列三个均不为0的代数式中任选两个组成一个分式,并化简该分式:a2-2ab+b2,a2-b2,a-b。-八年级数学
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先化简,再求值:,其中x=3。-九年级数学
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先化简,再求值:,其中x=3,y=-。-九年级数学
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先化简,再求值:,其中。-九年级数学
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先化简,再求值:,其中x满足x2+7x=0。-九年级数学
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(1)计算:;(2)先化简,再求值:,其中。(结果精确到0.01)-九年级数学
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化简:的结果是[]A、B、C、-D、--八年级数学
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先化简,再求值:,其中x=+1。-九年级数学
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先化简,再求值:,其中a=-3。-九年级数学
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先化简,再求值:,其中。-九年级数学
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先化简,再求值:,其中x=。-九年级数学
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化简=()。-八年级数学
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阅读某同学化简的解答过程:解:原式=……第一步=……第二步=………第三步回答:(1)上述过程中,第一步使用的具体公式是_____(2)上述运算过程是否有错误?_____,如有错误,是在第_____-八
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计算:(1);(2)。-九年级数学
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先化简,再求值:,其中。-九年级数学
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若实数x,y满足,求代数式的值。(要求对代数式先化简,再求值)-九年级数学
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化简:-九年级数学
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已知:x2-4x+4与|y-1|互为相反数,则式子的值等于()。-九年级数学
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先化简,再求值:,其中。-九年级数学
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先化简,再求值:,其中a=1,b=。-九年级数学
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已知,则()。-九年级数学
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先化简:,再从1,2,3中选一个你认为合适的数作为a的值代入求值。-九年级数学
题目简介
先化简,再求值:,其中。-九年级数学
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答案
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