问题
解答题
计算:2(m+1)2-(2m+1)(2m-1).
答案
2(m+1)2-(2m+1)(2m-1),
=2(m2+2m+1)-(4m2-1),
=2m2+4m+2-4m2+1,
=-2m2+4m+3.
计算:2(m+1)2-(2m+1)(2m-1).
2(m+1)2-(2m+1)(2m-1),
=2(m2+2m+1)-(4m2-1),
=2m2+4m+2-4m2+1,
=-2m2+4m+3.