Jawabanmu

2014-01-15T20:08:22+07:00
A= 4x
b=5x
c=2
a+b= 4x+5x = 9x
ab= 4x^5x = 20 x^{2}
2014-01-15T20:48:40+07:00
A = 8x
b = 5x
c = 2

a + b = 8x + 5x = 13x
AB = 8x.5x=40x