Jawabanmu

2014-08-28T08:11:21+07:00
A = 7 
b = 3
a + b = 7 + 3 = 10

a = 7 , b = 3 tuh dari mana??? @jaelaniwahyu
Udah dijawab Radis3D
2014-08-28T08:13:32+07:00
a^{2} - b^{2} = 40
a^{2} - b^{2} --> (a - b)(a + b)

a - b = 4

4(a + b) = 40
a + b =  \frac{40}{4}
a + b = 10