Jawabanmu

2014-08-20T20:57:12+07:00
A = (1 - √2) (1 + √2)
b = (3 + √2) (3 - √2)
maka,
a + b = ( (1 - √2) (1 + √2) )+ ( (3 + √2) (3 - √2) )
        = ( 1 - 2 ) + ( 9 - 4 )
        = (-1) + 5
        = 4
2 5 2