问题
解答题
化简:
(1)9a+7a-6a
(2)(3a2-b2)-3(a2-2b2)
答案
(1)9a+7a-6a
=16a-6a
=10a;
(2)(3a2-b2)-3(a2-2b2)
=3a2-b2-3a2+6b2
=5b2.
化简:
(1)9a+7a-6a
(2)(3a2-b2)-3(a2-2b2)
(1)9a+7a-6a
=16a-6a
=10a;
(2)(3a2-b2)-3(a2-2b2)
=3a2-b2-3a2+6b2
=5b2.