possible answers
a) 4.2m squared + 1.5n
b) 4.2m squared - 1.5n
c)1.5m squared + 4.2n
d)1.5 m squared - 4.2n
Answers:
Put all the like variables together:
(1.7m^2 + 2.5 m^2) + (6.5n - 4n - n)
do the math on the like variables
(4.2m^2 ) + (6.5n -5n)
or
4.2m squared + 1.5n