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What are all the real square roots of 225?
It is 15, -15.
What are all the real cube roots of 0.125?
They are 0.5 : it is a triple root.
What is all the real square roots in 0.0049?
Well, darling, the real square roots of 0.0049 are +0.07 and -0.07. It's simple math, really. Just remember, a negative times a negative gives you a positive, and a positive times a positive also gives you a positive. Math can be sassy too, you know!
Are all square roots of even numbers rational?
No. The square roots 8 are irrational, as are the square roots of most even numbers.
What is the greatest number of real roots a polynomial of degree 2 can have?
A real root is when a quadratic equation, or the graph of a polynomial, crosses the x axis, or when the y coordinate is equal to 0. On any polynomial to the degree of two, when graphed the line follows a smooth arc in the shape of a "U" or and upside down "U". Since there are only two prongs to the parabola, or arc, it can only cross the x axis twice, if at all. So there can only be 2 real roots.
