Which expressions are differences of squares?

choose all answers that are correct.

8b^2 - 16c^6

16e^8 - 81g^4

49x^25 - 4y16

121m^18 - 9n^10

Step-by-step explanation:

For a term to be a square, the coefficient must be a square (8 is not), and the degree must be even (25 is not). Of course, the sign between the terms must be a minus sign.

After eliminating the expressions that don't contain squares, the remaining expressions are listed above.

16e^8-81g^4    and   121m^18-9n^10

im here

step-by-step explanation:

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet