问题
填空题
(6x2-7x-5)-______=5x2-2x+3
答案
5x2-2x+3-(6x2-7x-5)=5x2-2x+3-6x2+7x+5=-x2+5x+8=-(x2-5x-8)
故填(x2-5x-8).
(6x2-7x-5)-______=5x2-2x+3
5x2-2x+3-(6x2-7x-5)=5x2-2x+3-6x2+7x+5=-x2+5x+8=-(x2-5x-8)
故填(x2-5x-8).