Answer
a.$\qquad 8x^{2}+2x-3$
b. The leading term has the highest exponent, which gives us the degree of the polynomial.
Work Step by Step
a. Place terms in order
$2x-3+8x^{2}=8x^{2}+2x-3$
b. The leading term has the highest exponent, which gives us the degree of the polynomial.
A polynomial of degree 2 is called quadratic,
a polynomial of degree 3 is called cubic,
a polynomial of degree 4 is called quartic, etc.