Toán Lớp 8: (x-3)^2-(x-3)(x+3)=0 giúp với!!
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Toán Lớp 8: (x-3)^2-(x-3)(x+3)=0 giúp với!!
Comments ( 2 )
<=>(x-3).(x-3-x-3)=0
<=>(x-3).(-6)=0
<=>x-3=0
<=>x=3
Vậy x=3