You can simply expand each product and see whether it gives you a difference of squares.
•

That's actually

<span>✖
which is not a difference of squares.
</span>————<span>—
</span>•

✖
which is not a difference of squares.
—————
•

<span>✔
That is a difference of two squares.
</span>————<span>—
</span>•

<span>✖
</span>which is not a difference of squares.
—————
Only the
third option will result in a difference of squares.
Answer:
(− 7x + 4) · (− 7x − 4).
I hope this helps. =)
The actual photo has an area of 16*20 inches, so 320 inches squared. The ratio between the digital and real photo is 16:20. On the other hand, the width to length of the digital photo is x:2.5. Cross multiply the two ratios and solve for x. 16/20*x/2.5 —> 20x = 40 —> x = 2. The width of the digital image is 2 inches, so multiplying the width times the length gives you a 5 inches squared area for the digital image. Answer: 5 in^2
Answer:
the length will need to be increased by 5 feet
The answer should be 31/10
8+ the product of 2 and a number to the third power, what it means 2×m cubed. So it is 8+2m (cubed)