fallenangelkiss03 fallenangelkiss03 04-11-2026 Mathematics Answered Which expressions represent a perfect square monomial and its square root? Check all that apply. 121; 11$4 x^2 ; 2 x$$9 x^2-1 ; 3 x-1$$25 x ; 5 x$$49 x^4 ; 7 x^2$