Jawabanmu

2014-08-31T21:25:31+07:00
AB^2=AC^2+BC^2
x^2. = (x-7)^2 + (x-14)^2
x^2 = x^2 - 14x +49 + x^2 -28x +196
x^ 2 pindah ke kanan
x^2 - 42x + 245 = 0
difaktorkan
(x - 35) (x - 7)=0
x= 35 atau x = 7
11 3 11