The correct option is C x2+13x+48=0
A quadratic equation ax2+bx+c=0 with roots α,β is transformed for the roots α−k and β−k where k∈R,
is given by a(x−k)2+b(x−k)+c=0
Here, a=1,b=3,c=8,k=5
∴1(x+5)2+3(x+5)+8=0
⇒x2+10x+25+3x+15+8=0
⇒x2+13x+48=0
Hence, required quadratic equation is x2+13x+48=0