计算:(1)2a•a3+3a7÷a3(2)(x+4)(2x-1)+(x+2)(x-2)
题型:解答题难度:一般来源:不详
计算: (1)2a•a3+3a7÷a3 (2)(x+4)(2x-1)+(x+2)(x-2) |
答案
(1)原式=2a4+3a4=5a4; (2)原式=2x2-x+8x-4+x2-4=3x2+7x-8. |
举一反三
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