Răspunsuri

  • Utilizator Brainly
2014-09-25T15:06:48+03:00
3(x+5)-5(1-x)(1+x)=(x+3)^2+(2x-1)^2+13
3(x+5)-5(1-x²)=(x+3)^2+(2x-1)^2+13
3x+15-5+5x²=x²+6x+9+4x²-4x+1+13
5x²+3x+10=5x²+2x+23
3x-2x=23-10
x=13