What is the squareroot of -4

How is the squareroot of -1 classified?

Is the squareroot of 75 8.6? I also was curious if all the tutors that answer questions get paid?...

If h(x) = Squareroot 7 + 6f(x), where f(1) = 7 and f'(1) = 2, find h'(1)

x^(2)+8x-2=0 A -4+3 squareroot 2 B -8+3 squareroot 2 C 4+3 squareroot 2 D 8+3 squareroot 2

5 squareroot 48 + 9 squareroot 3, what is this simplified?

-10 squareroot 3 + squareroot 27. simplify.

squareroot 10 + 6 squareroot 40. simplify.

7 squareroot 150 + 6 squareroot 6

-5 squareroot 7 + 7 squareroot 28

7 squareroot 72 - 5 squareroot 2

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