Toán Lớp 8: -0,6x(x-0,5)-0,3x(2x+1,3)=0,138
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Toán Lớp 8: -0,6x(x-0,5)-0,3x(2x+1,3)=0,138
Comments ( 2 )
<=>0,6x^2-0,3-0,6x^2+0,39x=0,138
<=>-0,3+0,39x=0,138
<=>0,39x=0,438
<=>x=73/65≈1,12