Giaii phương trinh sau :a)(x+1)(x+5)(-3x+8)=0 b)(5x+3)(x^2+4)(x-1)=0 c)(4x-1)(x-3)=(x-3)(5x+2) d)(x+6)(3x-1)+x+6=0 e)(2x-7)^2-6(2x-7)(x-3)=0 f)(x-2)(x+1)=x^2-4
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