A. Factor Completely.81c^2-49=B. Perform the indicated operations and simplifyx-3/x-9 – x+1/x+9 + x-117/x^2-81=C. Add.(3x^2-6xy+y^2)+(-7x^2-9xy-y^2)+(x^2+xy-5y^2)D. Multiply and simplify by factoring. Assume that all expressions under radicals represent nonnegative numbers.∛y^13 * ∛16y^14=