What is the negative square root of 900?

Answer 1

900 has 2 square roots, one positive and one negative (but equal if we ignore the + and - signs).

Now, since 900 = 9 x 100 = 3 x 3 x 10 x 10 the square roots of 900 are +(3 x 10) and -(3 x 10)

That gives us +30 and - 30