Question

lim de x tendendo a 5 X^2-3x-10/x-5

Answer 1

Lim (x²-3x-10)/(x-5)
x-->5

P(x)=ax²+bx+c =a*(x-x')*(x-x'')     ...sendo x'  e x''  as raízes e a ≠ 0

x²-3x-10 =1*(x-5)*(x+2)

Lim (x-5)*(x+2)/(x-5)
x-->5

Lim (x+2) =5+2=7
x-->5