What is the answer to the problem above fast

Lassify the function as linear or quadratic and identify the quadratic, linear, and constant terms. f(x) = (3x + 2)(−6x − 3) linear function; linear term: −21x; constant term: −6 linear function; linear term: −18x2; constant term: −6 quadratic function; quadratic term: 6x2; linear term: 24x; constant term: −6 quadratic function; quadratic term: −18x2; linear term: −21x; constant term: −6

To determine the number of deer in a forest a forest ranger tags 280 and releases them back

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?