(m-1/4n)(m+1/4n)-3(m+1/4n)^2其中m=-1,n=4
=m²-n²/16-3m²-3n²/16-3mn/2
=-2m²-n²/4-3mn/2
=-2×1-16/4-3×(-1)×4/2
=-2-4+6
=0
很高兴为您解答,skyhunter002为您答疑解惑
如果本题有什么不明白可以追问,
(m-1/4n)(m+1/4n)-3(m+1/4n)^2其中m=-1,n=4
=m²-n²/16-3m²-3n²/16-3mn/2
=-2m²-n²/4-3mn/2
=-2×1-16/4-3×(-1)×4/2
=-2-4+6
=0
很高兴为您解答,skyhunter002为您答疑解惑
如果本题有什么不明白可以追问,