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Toán Lớp 8: tìm x a.x^2 -2x-15=0 b.(2x+1)^2 -4(x-1)(x+1)=9 c. (x+2)(x^2-2x+4)-x(x-1)^2=2x^2

Home/ Toán Lớp 8: tìm x a.x^2 -2x-15=0 b.(2x+1)^2 -4(x-1)(x+1)=9 c. (x+2)(x^2-2x+4)-x(x-1)^2=2x^2

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