Question

find zeroes for f(x)= x²-4x-5​

Answer 1

Answer:

» x² - 4x - 5 = 0

» x² -5x + x - 5 = 0

» (x + 1) (x - 5) = 0

» x = - 1 or 5

Answer 2

Answer:

5 , -1

Step-by-step explanation:

x² - 4x - 5

= x² - 5x + x - 5

= x ( x - 5 ) + 1 ( x - 5 )

= ( x - 5 )( x + 1 )

⇒ x = 5 , -1