Que.21- For the following polynomial, find the values of p(-1) andp(2),
p(x) = 4x 3 + 2×2 – 3x + 2​

2 thoughts on “Que.21- For the following polynomial, find the values of p(-1) andp(2),<br />p(x) = 4x 3 + 2×2 – 3x + 2​”

1. p(x)=4x³+2x²-3x+2

   Step-by-step explanation:

   now, we have to put the value of p

   p(-1)= 4(-1)³+2(-1)²-3(-1)+2

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

   p(-1)= 3

   p(2)= 4(2)³+2(2)²-3(2)+2

   p(2)= 32+8-6+2

   p(2)= 36

   hence, the value of p(-1) is 3 and p(2) is 36

   hope it is helpful for you…

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   thanks

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2. Answer:

   In an algebraic expression, if the powers of the variables are whole numbers then the algebraic expression is a polynomial.

   (i) y+1/y = y+y-1

   Here, one of the powers of y is −1, which is not a whole number. So, y + 1/y is not a polynomial.

   (ii) 2 – 5 √x=2-5×1/2

   Here, the power of x is 1/2, which is not a whole number. So, 2 – 5 √x is not a polynomial.

   (iii) x2 + 7x + 9

   Here, the powers of the variable x are 2, 1 and 0, which are whole numbers. So, x2 + 7x + 9 is a polynomial.

   (iv) 2m−2 + 7m − 5

   Here, one of the powers of m is −2, which is not a whole number. So, 2m−2 + 7m − 5 is not a polynomial.

   (v) 10 = 10 × 1 = 10×0

   Here, the power of x is 0, which is a whole numbers. So, 10 is a polynomial (or constant polynomial).

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