Question

descopera numarul n care indeplineste conditia n•n = n+n

Answer 1

n=2 pt. ca 2x2=2+2 sunt egale

Answer 2

n · n = n + n ⇔ n² = 2n ⇔ n² - 2n = 0 ⇔ n · (n - 2) = 0 ⇒ n = 0 sau n - 2 = 0, n = 2.