Răspunsuri

2014-05-19T17:41:06+03:00
(x+3)^2=(x+1)^2+(x+2)^2
x^2+6x+9=x^2+2x+1+x^2+4x+4
x^2+6x+9=2x^2+6x+4
6x+9-6x-4=2x^2-x^2
5=x^2
x= radical din 5