2√3 - 2√5
Using the law of radicals
√a × √b = √ab
√2(√6 - √10)
= √12 - √20
= √(4 × 3) - √(4 × 5)
= (√4 ×√3) - (√4 × √5)
= 2√3 - 2√5
= -
Answer: A
6.0m questions
7.8m answers