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Toán Lớp 8: 1)(4x-1).(5+3x)+2x-7=7x+12x^2-9 2)18x-9+5x.(2x-1)=0 3)(7x-1)^2-(2x+3)^2=0 4)7x.(x-5)+x^2-25=0 Tìm x giúp mình vs lớp 8 nhaaa

Home/ Toán Lớp 8: 1)(4x-1).(5+3x)+2x-7=7x+12x^2-9 2)18x-9+5x.(2x-1)=0 3)(7x-1)^2-(2x+3)^2=0 4)7x.(x-5)+x^2-25=0 Tìm x giúp mình vs lớp 8 nhaaa

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