Question

B = {x: x² - 2x - 3 = 0 }.

The elements of the set B are
a) 1,3 b) - 1,3 c) - 3,1 d) None​

Answer 1

Answer:

» x² - 2x - 3 = 0

» x² - 3x + x - 3 = 0

» x (x - 3) + (x - 3) = 0

» x = - 1 or x = x = 3

Therefore, B = {-1, 3}