Question

What is the value of the polynomial 3x3 + 4x2 + 1 if x =  1/2 ?
​

Answer 1

Step-by-step explanation:

ANSWER

Let p(x)=3x

2

−4x

2

+7x−5 is our polynomial.

∴p(3)=3(3)

3

−4(3)

2

+7(3)−5

=3(27)−4(9)+21−5

=81−36+21−5

=61

Now,

p(−3)=3(−3)

3

−4(−3)

2

+7(−3)−5

=3(−27)−4(9)−21−5

=−81−36−21−5

=−143