Jawabanmu

2014-02-06T12:13:28+07:00
(U2)² = (U1) x (U3)
10²  = (1+x) (x+16)
100 = x² + 17x +16
x² +17x - 84 = 0
(x+21) (x-4)
x, = -21
x,, = 4