[-(4m+1)]²-4×2×(2m²-1)怎么算
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[-(4m+1)]²-4×2×(2m²-1)怎么算
![[-(4m+1)]²-4×2×(2m²-1)怎么算](/uploads/image/z/15199225-25-5.jpg?t=%EF%BC%BB-%284m%2B1%29%EF%BC%BD%26%23178%3B%EF%BC%8D4%C3%972%C3%97%282m%26%23178%3B%EF%BC%8D1%29%E6%80%8E%E4%B9%88%E7%AE%97)
=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
=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
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