Question

1. simplify (√5+√2)^2.

2.if x=√5+2, then prove that x^2+ 1/x^2=18

3.if (√2-√3) / (3√2+2√3) = a + b √6 where A and B are rational numbers,
then find the values of a and b.​

Answer 1

Answer:

1. using (a+b)^2= a^2+b^2+2ab

therefore √5^2+√2^2+2√5√2

or 5+2+6.32

or 13.32 is the answer