hitunglah tiap hasil kali bilangan-bilangan dibawah ini! 1. (√2-√3) (√2-5√3)= 2. (√5-1) (√5+2)= tolong bantuannya!!

1. (√2 -√3) (√2 -5√3)
= (√4 -5√6 - √6 + 5√9)
= (2 -4√6+15)
= #17 - 4√6

2. (√5-1) (√5+2)
= (√25 + 2√5- √5 - 2)
= (5 + √5 - 2)
= #3 + √5