What is OABC is rotated 90 degrees clockwise , centre (2,0)?

Maybe the answer is 20mm. all i really did was just multiply, which is obvious.

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 *_*