We have

so this is indeed a difference of squares. Factorizing would give

making the answer D.
We can further factor the first term here and write

but that's clearly out of the scope of this question.
-69= 7v-6 so v equals 74 or something
Answer: 53
:))))))))))))))))
-6x^4-7x^2+5x-10. hope this helps ! :)
Answer:

<h3>4 is the right answer.</h3>

<h3>8 is the right answer.</h3>