Question

caranya bagaimana????

Answer 1

Kali silang aja.. nanti hasilnya ketemu

Answer 2

*Dengan Cara *Capit Kepiting (Kali Silang) :
(a + b)(c + d) = a.c + a.d + b.c + b.d

*Sifat Penjumlahan Akar :
a√b + c√b = (a + c)√b

(√5 + 7)(√5 + 9) = (√5×√5) + (√5 × 9) + (7 ×√5) + (7 × 9)
= 5 + 9√5 + 7√5 + 63
= 68 + (9 + 7)√5
= 68 + 16√5 √

Semoga Membantu :)