Question

find the value of 4x²-5x³+9x+2 when x is -5​

Answer 1

Answer:

Step-by-step explanation:

Let p (x) = 4x² - 5x³ + 9x + 2

Rearranging the given equation, we get

p (x) = - 5x³ + 4x² + 9x + 2

Now putting " x = - 5 " in p -x ),we get

p ( - 5 ) = ( - 5) ( - 5 )³ + 4 ( - 5 )² + 9 ( - 5 ) + 2

= ( - 5 ) (- 125 ) + 4 ( 25 ) - 45 + 2 ( ∵ + × - = - )

= 625 + 100 + 2 - 45 ( ∵ - × - = + )

= 727 - 45

= 682 is the answer