问题
解答题
化简下列整式 (1)12x-20x-5x; (2)(8y-7x)-(4x-5y); (3)(2x2-
|
答案
(1)原式=(12-20-5)x=-13x;
(2)原式=8y-7x-4x+5y=13y-11x;
(3)原式=2x2-
+3x-4x+4x2-1=6x2-x-1 2
.3 2
化简下列整式 (1)12x-20x-5x; (2)(8y-7x)-(4x-5y); (3)(2x2-
|
(1)原式=(12-20-5)x=-13x;
(2)原式=8y-7x-4x+5y=13y-11x;
(3)原式=2x2-
+3x-4x+4x2-1=6x2-x-1 2
.3 2