Question

Which expression represents a difference of squares?

A. t² +100
B. 4x² - 16x
C. 25k-64
D. 81-49y²

Answer 1

D represents a difference of squares.

Answer 2

Answer: Choice [D] -
`\boldsymbol{81-49y^2}`

Explanation:

Hii, do you need to know which expression represents a difference of squares? No problem! (:

The Difference of Squares

Let's consider it for a moment. The "difference of squares" means we subtract two numbers squared, like
`\boldsymbol{a^2-b^2}`.

Now let's check our choices and see where we subtract two numbers squared.

The only choice like that is Choice [D] -
`\boldsymbol{81-49y^2}`.

In choice A, we add 2 numbers; in choices B and C we don't subtract two numbers squared.

Voila! There's our solution, cheers! (:

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Hope that this helped! Best wishes.

`\it Reach\;far.\;Aim\;high.\;Dream\;big.`

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