Question

1(a) rationalise the denominator 215 +3​

Answer 1

Step-by-step explanation:

We rationalise the denominator of (32−552−3) by multiplying its rationalising factor (32+5) in the numerator and denominator as follows: 

           

32−552−3×32+532+5=(32−5)(32+5)(52−3)(32+5)=

(32