化简求值(2x-1)²-(3x+1)(3x-1)-5x(x-1) ,其中x=2
(2x-1)²-(3x+1)(3x-1)-5x(x-1)=4x²-4x+1-(9x²-1)-(5x²-5x)=-10x²+x+2=-(10x²-x-2)
=-(2x-1)(5x+2)=-(4-1)(10+2)=-36