Question

(x+3)²=25 va rog, e urgent ​

Answer 1

Răspuns:

Explicație pas cu pas:

x^2+6x+9=25;

x^2+6x-16=0

delta=-b^2-4ac;

x1,2=-b+-$\sqrt{delta}$/2a;

delta=36-4*1*(-16);

delta=36+64;

delta=100;

x1,2=-6+-$\sqrt{100}$/2;

x1=-6-10/2;

x1=-8;

x2=-6+10/2;

x2=2;