Question

find the value of the polynomial 5x-4x^2+3 at x=2​

Answer 1

Answer:

The value of a polynomial obtained on putting a particular value of the variable is called the value of the polynomial.

The value of a polynomial p(x) at x= a(let) is denoted by p(a).

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Solution:

i)                  

p(x) = 5x - 4x² + 3

On putting x=0 ,

p(0) = 5(0) - 4(0)² + 3

= 0 - 0 +3=3

= 3

ii)

(x) = 5x - 4x² + 3

On putting x= -1,

p(-1) = 5(-1) - 4(-1)²+ 3

= -5 - 4(1) + 3

= -5-4+3= -9+3= -6

= -6

iii)

p(x) = 5x - 4x² + 3

On putting x=2

p(2) = 5(2) - 4(2)² + 3

= 10 – 16 + 3 = -6+3

= -3

Step-by-step explanation:

I hope this helped!!! :)

Answer 2

P(x) = -4x^2 + 5x + 3
Therefore,
P(2) = -4 (2)^2 + 5(2) + 3
= -16 + 10 +3
= -3