Corresponding sides of similar triangles are proportional given abc with de ac

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 equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Ineed if you could explain and give me the answer you! this needs done