Question

Решите уравнения
(x2-1)(x+3)=0
(x2-4)(x+1)=0

Answer 1

(x2-1)(x+3)=0
x2  -1 = 0 => x  =1 or x = -1
or
x+3 = 0 => x = -3
(x2-4)(x+1)=0
x2 - 4 = 0 => x = 2 or x = -2
or
x  +1 = 0 = >x = -1