Toán Lớp 6: x2 + x = 0
Tìm x
chú ý: x2 là x mũ 2
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Toán Lớp 6: x2 + x = 0
Tìm x
chú ý: x2 là x mũ 2
Comments ( 2 )
=>x.x+x=0
=>x.(x+1)=0
=>[(x=0),(x+1=0):}
=>[(x=0),(x=0-1):}
=>[(x=0),(x=-1):}
Vậy x\in{0;-1}