Question

p(x) = 2x^3 -3x + 4 where x = (-1/2)

Answer 1

Answer:

21/4

Note:

★ If the expression for p(x) is given , then to find p(a) , we need to substitute x = a everywhere in the expression of p(x) .

Solution:

Hence,

The given polynomial is :

p(x) = 2x³ - 3x + 4

If x = (-1/2) , then

=> p(-1/2) = 2•(-1/2)³ - 3•(-1/2) + 4

=> p(-1/2) = -1/4 + 3/2 + 4

=> p(-1/2) = (-1 + 6 + 16)/4

=> p(-1/2) = 21/4

Hence,

The required answer is 21/4 .