Question

помогите пожалуйста!!!

Answer 1

Ответ:

Объяснение:

1) $5y^{2}+2y-10+3y^{2}-y+7=8y^{2}+y-3$

$5y^{2}+2y-10-(3y^{2}-y+7)=5y^{2}+2y-10-3y^{2}+y-7=2y^{2}+3y-17$

2) $5m^{3}-m+3+4m^{3}+m-4=9m^{3}-1$

$5m^{3}-m+3-(4m^{3}+m-4)=5m^{3}-m+3-4m^{3}-m+4=m^{3}-2m+7$

3) $3a^{4}+3a^{3}-9+3a^{4}-3a^{3}+9=6a^{4}$

$3a^{4}+3a^{3}-9-(3a^{4}-3a^{3}+9)=3a^{4}+3a^{3}-9-3a^{4}+3a^{3}-9=6a^{3}-18$

4) $5p^{2}-2pq-7q^{2}+3p^{2}+2pq+5q^{2}=8p^{2}-2q^{2}$

$5p^{2}-2pq-7q^{2}-(3p^{2}+2pq+5q^{2})=5p^{2}-2pq-7q^{2}-3p^{2}-2pq-5q^{2}=2p^{2}-4pq-12q^{2}$