已知16x12-2（m+1）xy+49y2是一个完全平方公式，求m的值_百度知道
已知16x12-2（m+1）xy+49y2是一个完全平方公式，求m的值
+四分之一）3 已知x&#1781 已知16x12-2（m+1）xy+49y2是一个完全平方公式;+y²+P=（x-y）²=（x+y）&#178，求m的值2 （3x-二分之一）（3x+二分之一）（9x²+Q 求P
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已知16x2-2（m+1）xy+49y2是一个完全平方公式;-2xy-y²)-(x-y)²4)=81x的4次方-1/-x²+四分之一） 原式=(9x²+P=（x-y）²+y²-1/163 已知x²=-2xyQ=(x²+y²4)(9x²+Q 求P;+y&#178、QP=(x²+y²+1/)-(x+y)²+y²=（x+y）²=x²+2xy-y²=x²-x&#178，求m的值2(m+1)=±4×7×2∴m+1=28或m+1=-28∴m=27或m=-292 （3x-二分之一）（3x+二分之一）（9x&#178
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+四分之一）=(9x²-四分之一)(9x²+P=（x-y）²+四分之一)=81x^4-1/163 已知x&#1781 已知16x12-2（m+1）xy+49y2是一个完全平方公式;+Q 求P=-2=（x+y）&#178、Q=2xy，求m=-29的值2 （3x-二分之一）（3x+二分之一）（9x²+y&#178
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出门在外也不愁(1/C51H74N2/c1-5-9-13-17-21-49(22-18-14-10-6-2)42-53(43-50(23-19-15-11-7-3)24-20-16-12-8-4)51-39-37-47(38-40-51)32-31-45-27-25-44(26-28-45)29-30-46-33-35-48(41-52)36-34-46/h25-40,49-50H,5-24,42-43H2,1-4H3/b30-29+,32-31 )
Molecular Formula: C51H74N2Molecular Formula:
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填空（1）下列式子中是方程的是________，是一元一次方程的是________．（填序号）①16x－9＝5；②2x－5＝9x；③x2－1＝0；④2x－6y＝1；⑤8x＋3；⑥y＝－3；⑦；⑧2x＞1．（2）如果2xa＋1＝0是关于x的一元一次方程，那么a＝________．
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