a) √49c - √16c + √25c = 7√c - 4√c + 5√c = 8√c
b) √8m - 0.2√200m + 3√72m = 2√2m - 0.210√2m + 36√2m = 2√2m - 2√2m + 18√2m = 18√2m
c) (7√2 - √98 + √10) √2 = 7√2√2 - √98√2 + √10√2 = 7*2 - 7√2 + √20 = 14 - 7√2 + 2√5
a) √49c - √16c + √25c
= 7√c - 4√c + 5√c
= 8√c
b) √8m - 0.2√200m + 3√72m
= 2√2m - 0.210√2m + 36√2m
= 2√2m - 2√2m + 18√2m
= 18√2m
c) (7√2 - √98 + √10) √2
= 7√2√2 - √98√2 + √10√2
= 7*2 - 7√2 + √20
= 14 - 7√2 + 2√5