√100 + √-40 + √25 - √-10 simplified in a + bi form

Answer 1

square root of 100 is 10. 10 squared = 10x10 = 100

square root of 25 is 5. 5 squared = 25

square root of -40 = 2i x square root of 10

square root of -10 = i x square root of 10

10+5 = 15

2isqr10- isqr10 = isqr10

answer = 15+ (sqr10)i

a=15

b=sqr10

Answer 2

sqrt(100) = 10

sqrt(25) = 5

sqrt(-40) = isqrt(4*10) = 2isqrt(10)

sqrt(-10) = isqrt(10)

10 + 2isqrt(10) + 5 - isqrt(10) =

15 + sqrt(10)i