20 ! need which shows a difference of squares? 10y^2-4x^2 16y^2-x^2 8x^2-40x+25 64x^2-48x+9

16y^2-x^2

Step-by-step explanation:

16y² - x²   shows the difference of squares.

square root of 16y² is 4y

square root fo x² is x

(4y - x)(4y + x)

4y(4y + x) -x(4y + x)

16y² + 4xy -4xy - x²

16y² - x² 

The middle two terms is equal to zero.

16y^2-x^2

Step-by-step explanation:

just pick what you think i need more time let me know if this

step-by-step explanation:

the graph is negative for all real values of x where   -6 < x < -2.

step-by-step explanation:

this refers to the values of f(x) in the area below the x-axis.