(x-1)²-2(x²-1)=0 (x-2)²=9(x+3)² (x-2)²+6(x-2)+9=0
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(x-1)²-2(x²-1)=0
(x-1)²-2(x-1)(x+1)=0
(x-1)[(x-1)-2(x+1)]=0
(x-1)[x-1-2x-2]=0
(x-1)(-x-3)=0
(x-1)(x+3)=0
x=1或x=-3
(x-2)²=9(x+3)²
(x-2)²-9(x+3)²=0
[(x-2)-3(x+3)][(x-2)+3(x+3)]=0
(x-2-3x-9)(x-2+3x+9)=0
(-2x-11)(4x+7)=0
(2x+11)(4x+7)=0
x=-11/2或x=-7/4
(x-2)²+6(x-2)+9=0
(x-2+3)²=0
(x+1)²=0
x=-1
(x-1)²-2(x-1)(x+1)=0
(x-1)[(x-1)-2(x+1)]=0
(x-1)[x-1-2x-2]=0
(x-1)(-x-3)=0
(x-1)(x+3)=0
x=1或x=-3
(x-2)²=9(x+3)²
(x-2)²-9(x+3)²=0
[(x-2)-3(x+3)][(x-2)+3(x+3)]=0
(x-2-3x-9)(x-2+3x+9)=0
(-2x-11)(4x+7)=0
(2x+11)(4x+7)=0
x=-11/2或x=-7/4
(x-2)²+6(x-2)+9=0
(x-2+3)²=0
(x+1)²=0
x=-1
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