perezjahdyell perezjahdyell 07-03-2018 Mathematics contestada Let p=x^2+6 Which equation is equivalent to (x^2+6)^2-21=4x^2+24 in terms of p? Choose 1 answer: A. p^2-4p-21=0 B. p^2+4p−45=0 C. p2−4p−45=0 D. p^2+4p−21=0