Question

ile rozwiązań ma równanie (x + 2)^2 = 16

Answer 1

(x + 2)^2 = 16

(x + 2)^2 = 4^2     lub    (x + 2)^2 = (-4)^2

x + 2 = 4                           x + 2 = -4

x = 4 - 2                            x = -4 - 2

x = 2                                   x = -6

 

odp. x = 2  lub  x = -6