Simplify sqrt -5 + sqrt -20?

Question

Simplify sqrt -5 + sqrt -20?

Answer 1

I have no idea, this problem is like at higher math level

Answer 2

cannot squareroot a negative!

Answer 3

Assuming you have knowledge of complex numbers,

sqrt(-5) + sqrt(-20)

sqrt(-1) * sqrt(5) + sqrt(-1) * sqrt(20)

i * sqrt(5) + i * sqrt(20)

i * sqrt(5) + i * sqrt(5) * sqrt(4)

i * sqrt(5) + i * sqrt(5) * 2

3sqrt(5) * i

Answer 4

√(- 5) + √ (- 20)

√ ( 5 i ² ) + √( 20 i ² )

√5 i + 2√5 i

3√5 i

Answer 5

you cannot have squareroot of negative numbers in the real world. However if you assume sqrt of (-1) as 'i', then it would go like this:

sqrt -5 + sqrt -20 = sqrt (-5) + (sqrt (-5) * sqrt (4)) = sqrt (-5) times (1 + sqrt(4)) = sqrt (-5) times 3 = 3i times sqrt (5).

Answer 6

(√5 + 2√5) i

= (3√5) i

If the "' - " isn't meant as a minus sign then ignore the " i ".