Answer:
2m+2n+7
Step-by-step explanation:
Given: Two polynomial
[tex]P_1=m+n+3[/tex]
[tex]P_2=m+n+4[/tex]
We need to find the sum of polynomial.
[tex]Sum=P_1+P_2[/tex]
[tex]\Rightarrow (m+n+3)+(m+n+4)[/tex]
write like term together
[tex]\Rightarrow m+m+n+n+3+4[/tex]
Combine the like term
[tex]\Rightarrow 2m+2n+7[/tex]
Hence, The sum of two polynomial is 2m+2n+7