Question

Plissss..Nanti kalau betul semua ku kasih pulsa 5rb.

Answer 1

1)  (√7+√2)(2√7 + √2) = 
= √7(2√7 + √2) + √2(2√7 + √2)
= 2(7) +√14 + 2√14 + 2
= 14 + 2 + 3√14
= 16 + 3√14

2) (2√3)(√8) = (2√3)(2√2)= 4√6

3) (√5+√3)(√2+√7)=
= √5(√2+√7) + √3(√2+√7)
= √10+√35 + √6 + √21

4) (2√3 + 3√2)(4√3 + 5√2)=
= 2√3 (4√3 + 5√2)  + 3√2(4√3 + 5√2)
= 8(3) + 10√6 + 12√6 + 15(2)
= 24 +30 + 22√6
= 54 + 22√6
.