What's the difference between centimeters square centimeters

Square centimeters are just telling that it's an area of a rectangle, square or some other shape.

The regular centimeter = cm while cm² = cm * cm

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*