计算:(1)8x29y2•3y-4x=______;(2)a2+5a+62a+6•a2+2a-8a2-4=______.-数学

题目简介

计算:(1)8x29y2•3y-4x=______;(2)a2+5a+62a+6•a2+2a-8a2-4=______.-数学

题目详情

计算:(1)
8x2
9y2
3y
-4x
=______;
(2)
a2+5a+6
2a+6
a2+2a-8
a2-4
=______.
题型:解答题难度:中档来源:不详

答案

(1)原式=class="stub"2x•4x
3y•3y
•class="stub"3y
-4x
=-class="stub"2x
3y

(2)原式=
(a+2)(a+3)
2(a+3)
(a+4)(a-2)
(a+2)(a-2)
=class="stub"a+4
2

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