(4x-1)(5x+7)=04x-1=0或5x+7=0x=1/4或x=-7/53x(x-1)=2(1-x)3x(x-1)-2(1-x)=03x(x-1)+2(x-1)=0(x-1)(3x+2)=0x=1或x=-2/3(x+1)²-25=0(x+1+5)(x+1-5)=0(x+6)(x-4)=0x=4或x=-62(x-3)=x²-92(x-3)-(x²-9)=0...