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need help in finding out g(-2) when g(x)= sqrt 5-x + 2.
x = -2, then substitute
g(-2)= sqrt (5-(-2) + 2)
= sqrt (5+2+2)
= sqrt 9
= 3
Another question is sqrt -36 the same as -sqrt 36. would answer still be 6i?
sqrt -36 is not the same as - sqrt 36
Why? sqrt (-36) = sqrt (36 * -1)
= sqrt 36 * sqrt (-1)
= 6 sqrt (-1) Remember that sqrt (-1) = i
= 6i
While - sqrt 36 = - 6
One last question: sqrt -36 divided by sqrt -9. Is answer -2?
sqrt -36
____________
sqrt -9
sqrt 36 * -1)
________________
sqrt (9 * -1)
sqrt 36 * sqrt (-1)
____________________
sqrt 9 * sqrt (-1)
6i
______
3i
2 * 
________
2
(