Jawabanmu

2014-09-11T05:50:37+07:00
X²-2x-10=(x-1)² -1-10=(x-1)²-11..... (x-1)²=11 ...(x-1)=+/-√11

(x+1+√11)(x+1-√11)

3x²-x-10=(x-2)(3x+5)


3 4 3