已知5^=9,5^y=3,求5^x 2y+1和5^2x+y-2的值1、已知5^=9,5^y=3,求5^x 2y+1和5^2x+y 22、先化简,再求值：(a-3b)^2+(3a+b)^2-(a+5b)^2+(a-5b)^2,其中a=-8,b=-6已知5^x=9,5^y=3,求5^x 2y+1和5^2x+y-2的值

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已知5^=9,5^y=3,求5^x 2y+1和5^2x+y-2的值1、已知5^=9,5^y=3,求5^x 2y+1和5^2x+y 22、先化简,再求值：(a-3b)^2+(3a+b)^2-(a+5b)^2+(a-5b)^2,其中a=-8,b=-6已知5^x=9,5^y=3,求5^x 2y+1和5^2x+y-2的值
已知5^=9,5^y=3,求5^x 2y+1和5^2x+y-2的值
1、已知5^=9,5^y=3,求5^x 2y+1和5^2x+y 2
2、先化简,再求值：
(a-3b)^2+(3a+b)^2-(a+5b)^2+(a-5b)^2,其中a=-8,b=-6
已知5^x=9,5^y=3,求5^x 2y+1和5^2x+y-2的值

已知5^=9,5^y=3,求5^x 2y+1和5^2x+y-2的值1、已知5^=9,5^y=3,求5^x 2y+1和5^2x+y 22、先化简,再求值：(a-3b)^2+(3a+b)^2-(a+5b)^2+(a-5b)^2,其中a=-8,b=-6已知5^x=9,5^y=3,求5^x 2y+1和5^2x+y-2的值
2,a^2+9b^2-6ab+9a^2+b^2+6ab-a^2-25b^2-10ab+a^2+25b^2-10ab=10a^2+10b^2-20ab=10(a^2-2ab+b^2)=10(a-b)^2,第一个条件5^=9有问题,写成对数的形式就OK了

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