Which expression represents a perfect square monomial and it's square root? Check all that apply

[]121; 11

[]4x2; 2x

[]9x2-1; 3x-1

[]25x; 5x

[]49x4; 7x2

A. 121; 11

B. 4x²; 2x

E. 49x⁴; 7x²

Step-by-step explanation:

A. 121 is a square of 11. Thus this expression represents a perfect square monomial and it's square root.

B. 4x² is a square of 2x. Thus this expression represents a perfect square monomial and it's square root.

C. The square of 3x⁻¹ is 9x⁻² not 9x²⁻¹ it is equal to 9x. Thus this expression does not represents a perfect square monomial and it's square root.

D. The square of 5x is 25x² not 25x. Thus this expression does not represents a perfect square monomial and it's square root.

E. 49x⁴ is a square of 7x². Thus this represents a perfect square monomial and it's square root.

i think just 121; 11

Step-by-step explanation:

you just times the number by itself ex; 11*11 = 121