［-(4m+1)］²－4×2×(2m²－1)怎么算

［-(4m+1)］²－4×2×(2m²－1)怎么算
［-(4m+1)］²－4×2×(2m²－1)怎么算

［-(4m+1)］²－4×2×(2m²－1)怎么算
=16m^2+8m+1-16m^2+8
=8m+9
因为负数的平方等于正数,(-a)^2=a^2
[-(4m+1)]^2
=(4m+1)^2
=16m^2+8m+1

原式=16m²+8m+1-16m²+8
=8m+9