问题
解答题
计算: (1)
(2)(2a-b)2+(a+b)(4a-b) (3)(8a3b-5a2b2)÷4ab. |
答案
(1)原式=2-(-0.5)-0.5=2+0.5-0.5=2;
(2)原式=4a2-4ab+b2+4a2-ab+4ab-b2=8a2-ab;
(3)原式=2a2-
ab.5 4
计算: (1)
(2)(2a-b)2+(a+b)(4a-b) (3)(8a3b-5a2b2)÷4ab. |
(1)原式=2-(-0.5)-0.5=2+0.5-0.5=2;
(2)原式=4a2-4ab+b2+4a2-ab+4ab-b2=8a2-ab;
(3)原式=2a2-
ab.5 4