-2 and -6
As a polynomial in standard form, x plus 5x plus 2 is 6x + 2.
X2 - X - 2(X + 1)(X - 2)===============(X + 1) is a factor of the above polynomial.
yes
Yes.
2 or 5
Yes, f(x) = 2 is a polynomial of degree 0 (because there are no x terms).
-2 and -6
5
As a polynomial in standard form, x plus 5x plus 2 is 6x + 2.
X2 - X - 2(X + 1)(X - 2)===============(X + 1) is a factor of the above polynomial.
It is a polynomial if the square root is in a coefficient but not if it is applied to the variable. A polynomial can have only integer powers of the variable. Thus: sqrt(2)*x3 + 4*x + 3 is a polynomial expression but 2*x3 + 4*sqrt(x) + 3 is not.
X^2-x-12------------X+3
(x-2)(x+2)
yes
Yes.
To square an expression, multiply it by itself. And to multiply a polynomial by a polynomial, multiply each part of one polynomial by each part of the other polynomial.