Question

Rationalise the denominator and simplify 1 / 5 - 2√3

Answer 1

Answer:

1/2√5-√3 × 2√5+√3

2√5+√3 / (a²) - (b²)

2√5+√3 / 2×2√5²-(√3)²

2√5+√3 / 4×5-3

2√5+√3 / 20-3

2√5+√3 / 17