Which shows a difference of squares?

10y^2−4x^2

16y^4−x^2

8x^2−40x+25

64x^2−48x+9

A difference of squares must be a binomial, so we want two terms. This rules out the third and fourth options.

If we look at the first two, we must check that both terms are perfect squares.

Look at the first one: is a perfect square (it's ), but is not a perfect square, because 10 is not a perfect square.

On the other hand, if we look at the second option, is the square of , and is clearly the square of . So, this is the difference of two squares.

step-by-step explanation:

a cube has 6 sides

the probability of getting 5 on the first cube is 1/6 since only one side of the cube has 5 on it.

there are 3 sides of the cube with even number on it [2,4,6]

therefore the probability of getting even number is 3/6

for both events to happen together, the probability would be

1/6 x 3/6 = 12/36

which simplifies to 1/12