Question

Find the value of the polynomial Q2 3x4 - 4x²7x-5 at x-3​

Answer 1

Step-by-step explanation:

Let p(x)= 3x³ - 4x² + 7x -5

At x= 3,p(3)= 3(3)1 -4(3)1 + 7(3) -5

= 81 -36 + 21 -5= 61

.: p(3)= 6

At x= -3, p(-3)= 3(-3)1 -4(-3)1 + 7(-3)-5

= -81 -36 -21 -5= -143

.: p(-3)= -143

Hence, the values of the given polynomial at

x= 3 and x= -3 are 61 and -143,

respectively,

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