Question

If p(x) =5x^3-3x^2+7x-9,find p(-1).
Hint:In the place of x use the value -1

a)-33
b)33
c)24
d)-24​

Answer 1

Answer:

Step-by-step explanation:

Given that,

p (x) = 5x³ - 3x² + 7x - 9

Now substituting " x = - 1 " in p (x)

p ( - 1 ) = 5 ( - 1 )³ - 3 (- 1)² + 7 (- 1)- 9

= 5 ( - 1) - 3 ( 1) -7 - 9 ( ∵ + × - = - )

= 5 - 3 - 7 - 9 ( ∵ - × + = - )

= 5 - 19

= - 14 is the answer.