What is the sum of square root of -2 and square root of -18?

√-2 + √-18

√-2 = √(-1*2) =  √-1 * √2 = i√2    Recall square root of -1 = i

√-18 = √(-1*18) =  √-1 * √1`8 = i√18    Recall square root of -1 = i

But √18 = √(9*2) = √9 * √2= 3√2

√-18 = i√18= i(3√2) = 3i√2

√-2 + √-18 = i√2 + 3i√2 = (i + 3i)√2 = 4i√2

So the sum is 4i√2,      where i = √-1

Hope this explains it.

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.