Question

find the value of x
x² - 2x - 15 = 0​

Answer 1

Answer:

x = 5 or -3

Step-by-step explanation:

x² - 2x - 15 = 0

⇒x² - 5x + 3x - 15 = 0

⇒x(x - 5) + 3(x - 5) = 0

⇒(x - 5) (x + 3) = 0

⇒x - 5 = 0 or x+3 = 0

⇒x = 5 or x = -3