3个回答
展开全部
3x^2-7x-2=(x-1)^2
3x^2-7x-2=x^2-2x+1
2x^2-5x-3=0
(2x+1)(x-3)=0
x=-1/2(舍) x=3
解集{3}
3x^2-7x-2=x^2-2x+1
2x^2-5x-3=0
(2x+1)(x-3)=0
x=-1/2(舍) x=3
解集{3}
展开全部
log(x-1)^(3x^2-7x-2)=2
log(x-1)^(3x^2-7x-2)=log(x-1)^(x-1)^2
(3x^2-7x-2)=(x-1)^2
3x^2-7x-2=x^2-2x+1
2x^2-5x-3=0
(2x+1)(x-3)=0
x=-1/2(舍去)或x=3
所以x=3
log(x-1)^(3x^2-7x-2)=log(x-1)^(x-1)^2
(3x^2-7x-2)=(x-1)^2
3x^2-7x-2=x^2-2x+1
2x^2-5x-3=0
(2x+1)(x-3)=0
x=-1/2(舍去)或x=3
所以x=3
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