Topic: Indices and Standard Form (Higher - Unit 2)
Specification References: N1.7
N1.7 The terms square, positive and negative square root, cube and cube root.
Candidates should be able to:
quote squares of numbers up to and the cubes of 1, 2, 3, 4, 5 and 10, also knowing the corresponding roots
recognise the notation and know that when a square root is asked for only the positive value will be required; candidates are expected to know that a square root can be negative
solve equations such as , giving both the positive and negative roots
Examples
Show that it is possible to write 50 as the sum of two square numbers in two different ways.