Question

х^2-64=0
х^2-100=0
помогите 

Answer 1

Формула разности квадратов
a^2 - b^2 = (a - b) ( a + b)

x^2 - 64 = 0
(x - 8) (  x + 8) = 0
x = - 8
x = 8

x^2 - 100 = 0
( x - 10) ( x + 10) = 0
x = - 10
x = 10