(1.3m + 2.5n)^2 = (1.3m + 2.5n)(1.3m + 2.5n)Expanding using the distributive property:= 1.3m 1.3m + 1.3m 2.5n + 2.5n 1.3m + 2.5n 2.5n= 1.69m^2 + 3.25mn + 3.25mn + 6.25n^2= 1.69m^2 + 6.5mn + 6.25n^2
Therefore, (1.3m + 2.5n)^2 = 1.69m^2 + 6.5mn + 6.25n^2.
(1.3m + 2.5n)^2 = (1.3m + 2.5n)(1.3m + 2.5n)
Expanding using the distributive property:
= 1.3m 1.3m + 1.3m 2.5n + 2.5n 1.3m + 2.5n 2.5n
= 1.69m^2 + 3.25mn + 3.25mn + 6.25n^2
= 1.69m^2 + 6.5mn + 6.25n^2
Therefore, (1.3m + 2.5n)^2 = 1.69m^2 + 6.5mn + 6.25n^2.