Jawabanmu

2014-08-22T16:35:47+07:00
1. ax"c+axd+bcx+bd
"=Pangkatt
2014-08-22T16:53:03+07:00
A + b = 6 ----- (1)
a × b = 4 ----- (2)
b = 6 - a ----- (3)

Sub (3),(2)
a × (6-a) = 4
6a - a² = 4
a² - 6a + 4 = 0 ----- (5)
a² - 6a  = -4
-6/2 = -3 dikuadratkan = -3² = 9, tambahkan di kedua sisi
a² - 6a + 9 = -4 + 9
a² - 6a + 9 = 5
(a - 3)(a - 3) = (a - 3)² = 5
(a - 3) = √5 = 2,2360679774997896964091736687313
a - 3 = 2,2360679774997896964091736687313
a = 3 + 2,2360679774997896964091736687313
a = 5,2360679774997896964091736687313

b = 6 - a = 6 - 5,2360679774997896964091736687313
b = 0,7639320225002103035908263312687

a² + b² = (5,2360679774997896964091736687313)² + (0,7639320225002103035908263312687)²
= 27,416407864998738178455042012388 + 0,58359213500126182154495798761231
= 28