Really need help with this

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

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?