Question

in spl series 5^2+7^2+9^2+......+39^2 plz say me with steps

Answer 1

5+2=7
2+7=9
2+9=11
2+11=13
11+39=50

Answer 2

5+2=7
7+2=9
9+2=11
11+2=13...
39+2=41.

plzz mark it as brainiest answer