Question

If f ( x ) = 3x² - 5x + 7 , Show that f ( -1 ) = 3 f ( 1 ) .Tysm :')​

Answer 1

Solution :

• 3x² - 5x + 7

put x = -1

• 3(-1)² - 5(-1) + 7

• 3(1) + 5 + 7

• 3 + 12

• 15

Now, put x = 1

• 3(1)² - 5(1) + 7

• 3(1) - 5 + 7

• 3 + 2

• 5

here :

• f(-1) = 15

• f(-1) = 3(5)

• f(-1) = 3 f(1)