Question

A equação literal de incógnita x:
(m + 1).x2 +(m2 + 1).x – 20 = 0 admite a raiz -5.

Answer 1

(m+1)* (-5²)+(m²+1)*(-5) -20=0

25m+25-5m²-5-20=0

-5m²+25m=0

m(-5m+5)=0

m=0

-5m+5=0 ==>m=1