Question

simplify root 5 + root 2 whole square by using identity

Answer 1

A radical is a root of a number. A square root is a radical. Roots can be square roots, cube roots, fourth roots and so on.

A square root is commonly shown as



where  is known as the radical sign and  is known as the radicand.



A square root of a number can also be represented as



and a radical as



where we say that in the above, we're finding the nth root of x. For more on the above notation, refer to section on exponents.

A radical can also be represented as



A square root is also represented as