计算第一题（-3a+2b）^2第二题(-4x-y)(4x-y)_数学解答

计算第一题（-3a+2b）^2第二题(-4x-y)(4x-y)

人气：398 ℃　时间：2020-02-03 05:55:35

解答

(1) (-3a+2b)²
=(2b-3a)²
=9a²+4b²-12ab
(2) (-4x-y)(4x-y)
=-(4x+y)(4x-y)
=-(16x²-y²)
=y²-16x²