Toán Lớp 8: X(x-1)-3x+3=0
x^2-x=6
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Toán Lớp 8: X(x-1)-3x+3=0
x^2-x=6
Giúp mình ạ
Comments ( 2 )
Đáp án:
x(x-1)-3x+3=0
x(x-1)-(3x-3)=0
x(x-1)-3(x-1)=0
(x-1)(x-3)=0
x-1=0 hoặc x-3=0
x=1 hoặc x=3
Vậy x=1 hoặc x=3
x²-x=6
x²-x-6=0
x²-3x+2x-6=0
x(x-3)+2(x-3)=0
(x-3)(x+2)=0
x-3=0 hoặc x+2=0
x=3 hoặc x=-2
Vậy x=3 hoặc x=-2
Xin ctlhn nha????????????