Let's simplify each expression:
3(4-m)(4+m)= 3(16 - m^2)= 48 - 3m^2
-5(x+y)(y-x)= -5(y^2 - x^2)= -5y^2 + 5x^2
2m(3a-5)(3a+5)= 2m(9a^2 - 25)= 18ma^2 - 50m
So, the simplified expressions are:
Let's simplify each expression:
3(4-m)(4+m)
= 3(16 - m^2)
= 48 - 3m^2
-5(x+y)(y-x)
= -5(y^2 - x^2)
= -5y^2 + 5x^2
2m(3a-5)(3a+5)
= 2m(9a^2 - 25)
= 18ma^2 - 50m
So, the simplified expressions are:
48 - 3m^2-5y^2 + 5x^218ma^2 - 50m