express in terms of i
square -225 + square -49
assuming you mean square root (otherwise there's no i involved),
√-225 = √225 i = 15i
√-49 = √49 i = 7i
sum is thus 22i
square -225 + square -49
√-225 = √225 i = 15i
√-49 = √49 i = 7i
sum is thus 22i