Question

已知关于二元三项式2x的二次方-mx-n分解因式的结果是(2x3)(x-1),失球m,n的值

Answer 1

2x^2-mx-n = (2x-3)(x-1) = 2x^2 - 2x - 3x + 3 = 2x^2 -5x + 3 => m = 5,n = -3;

2x^2-mx-n = (2x+3)(x-1) = 2x^2 - 2x + 3x - 3 = 2x^2 + x - 3 => m = -1,n = 3;

你确定你没有打错(2x3)(x-1)我想是(2x-3)(x-1)或(2x+3)(x-1)这两个吧,不管是什么,只要把它展开比较就行了,不理解我在给你解释,