Question

Which expressions represent a perfect square monomial and its square root? Check all that apply.

121: 11
4x2, 2x
9x2 – 1; 3x - 1
25x, 5x
49x4; 7,22

Answer 1

Answer: A,B,E

Explanation:

Answer 2

Option 1,2 and 5 represent a perfect square monomial and its square root.

Explanation:

To find : Which expressions represent a perfect square monomial and its square root? Check all that apply.

Solution :

1) 121, 11

As
`(11)^2=121`

This expression represents a perfect square monomial and it’s square root.

2)
`4x^2,2x`

As
`(2x)^2=4x^2`

This expression represents a perfect square monomial and it’s square root.

3)
`9x^2-1,3x-1`

As
`(3x-1)^2=9x^2+1-6x`

This expression does not represents a perfect square monomial and it’s square root.

4)
`25x,5x`

As
`(5x)^2=25x^2`

This expression does not represents a perfect square monomial and it’s square root.

5)
`49x^4,7x^2`

As
`(7x^2)^2=49x^4`

This expression represents a perfect square monomial and it’s square root.

Therefore, Option 1,2 and 5 represent a perfect square monomial and its square root.