The square root of a number whose prime factorisation is
2 x 2 x 3 x 3 x 3 x 3 x 5 x 5 is:
80
180
45
90
Square root = 2 x 3 x 3 x 5 = 90
A number whose prime factorisation is 3 × 5 × 11 is:
Find the value of a in 3 - square root 5 / 3 + 2 square root 5 = a square root 5 - 19/11