Question

Tolong dibantu ya.. pliss

Answer 1

A+b=3
a-b=2
dikurangi

2b=1
b=1/2
a=1,5

Answer 2

|a+b| = 3
(a+b)^2 = 3^2
a^2 + b^2 + 2ab = 9
a^2 + b^2= 9 - 2ab

|a-b| = 2
|a-b|^2 = 2^2
a^2 + b^2 - 2ab = 4
a^2 + b^2 = 4+2ab
9 -2ab = 4 +2ab
4ab = 9-4 = 5
ab = 5/4