问题
解答题
化简:(2x-1)2-(3x-1)(3x+1)+5x(x-1).
答案
(2x-1)2-(3x-1)(3x+1)+5x(x-1),
=4x2-4x+1-(9x2-1)+5x2-5x,
=4x2-4x+1-9x2+1+5x2-5x,
=-9x+2.
化简:(2x-1)2-(3x-1)(3x+1)+5x(x-1).
(2x-1)2-(3x-1)(3x+1)+5x(x-1),
=4x2-4x+1-(9x2-1)+5x2-5x,
=4x2-4x+1-9x2+1+5x2-5x,
=-9x+2.