(1)-8m²n²+2mn-16mn²
(1)-8m²n²+2mn-16mn²
{(m+n)²-4mn}{(m-n)²+4mn}+2(mn)²等于多少?
先化简,再求值,-2(mn-3m²)-[m²-5(mn-m²)+2mn],其中m=-1,n
先化简,再求值-2(mn-3m²)-【m²-5(mn-m²)+2mn】,其中m=1,n=-
4-m²n²+2mn
(m²-2mn+n²分之m-n 减 m²-n²分之mn+n²)n-1分
(3m-2n)²+24mn
先化简,再求值.①(mn-m²)÷m²-2mn+n²/mn·m²-n²
(4mn²+3m²n-4m)-2(mn²+3/2m²n+1)化简
先化简(m/m-n-n/m+n+2mn/m²-n²)²÷m²+mn/m,若m=1
先化简再求值:5m²n-1/2(8mn+2n²)+4(m²n+mn-2n²).其
(7m²-4mn-n²)-(3m²-mn+2n²)求解