Question

find the value of the polynomial t² - 3at + 5a² at t = -a , a​

Answer 1

Answer:

4x²-3x+7

Yes, this expression is a polynomial in one variable x.

(ii) y²+

$\sqrt{2}$

Yes, this expression is a polynomial in one variable y.

(iii) No. It can be observed that the exponent of variable t in term is , which is not a whole number. Therefore, this expression is not a polynomial.

(iv)  No. It can be observed that the exponent of variable y in termis −1, which is not a whole number. Therefore, this expression is not a polynomial.

(v) No. It can be observed that this expression is a polynomial in 3 variables x, y, and t. Therefore, it is not a polynomial in one variable.

Answer 2

p(x) = 5x²-3x + 7 ⟵(๑¯◡¯๑)

Putting x = 1

p(1) = 5(1)²-3(1) + 7

= 5-3+7

= 9

HOPE IT HELPS YOU...