на множители! 2yb+9yn+16b+72n. 3yd+7yn+57d+133n

y*(2b+9n)+8*(2b+9n)=(2b+9n)*(y+8)y*(3d+7n)+19*(3d+7n)=(3d+7n)*(y+19)

2yb+9yn+16b+72n=(2yb+16b)+(9yn+72n)=2b(y+8)+9n(y+8)=(2b+9n)(y+8)3yd+7yn+57d+133n=(3yd+57d)+(7yn+133n)=3d(y+19)+7n(y+19)=(3d+7n)(y+19)