1. Р=4а^2+5n-2+5a^2+3n+7a^2=16a^2+8n-2
2. 2mx-2nx-5my+5ny+8m-8n=2x(m-n)-5y(m+n)+8(m-n)
3. y=k/x, 3=k/-2, k=-6
1. Р=4а^2+5n-2+5a^2+3n+7a^2=16a^2+8n-2
2. 2mx-2nx-5my+5ny+8m-8n=2x(m-n)-5y(m+n)+8(m-n)
3. y=k/x, 3=k/-2, k=-6