Question

(-3a^2b^3)^3*(-2a^5b)^2
(2m-3n)(5m+n)-10(m+n)^2
упростить 

Answer 1

$(-3a^2b^3)^3*(-2a^5b)^2=(-27a^6b^9)*(4a^{10}b^2)=-108a^{16}b^{11}$

$(2m-3n)(5m+n)-10(m+n)^2= \ =(10m^2+2mn-15mn-3n^2)-10(m^2+mn+mn+n^2)= \ =(10m^2-13mn-3n^2)-10(m^2+2mn+n^2)= \ =10m^2-13mn-3n^2-(10m^2+20mn+10n^2)= \ =10m^2-13mn-3n^2-10m^2-20mn-10n^2= \ =-33mn-13n^2$