Răspuns :
Răspuns:
x = 4
Explicație pas cu pas:
(x - 5)(x + 3) = (x-5)²-8 <=>
x²+3x-5x-15 = x²-10x+25-8 <=>
-2x-15 = -10x+17 =>
10x-2x = 17+15 =>
8x = 32 =>
x = 32:8 =>
x = 4
[tex]\it (x-5)(x+3)=(x-5)^2-8 \Rightarrow (x-5)(x+3)-(x-5)^2=-8 \Rightarrow\\ \\ \Rightarrow (x-5)(x+3-x+5)=-8 \Rightarrow (x-5)\cdot8=-8|_{:8} \Rightarrow x-5=-1|_{+5} \Rightarrow x=4[/tex]