<span>w^2 + 18w + 77 = 0
breaking the middle term
</span><span>w^2 + 11w + 7w + 77 = 0
making pairs,
</span>(w^2 + 11w) + (7w<span> + 77) = 0
</span>w(w + 11) + 7(w + 11) = 0
(w+11)(w+7)=0
Hence,
the best answer is :
<span>C. (w + 7)(w + 11) </span>
Answer:
87
Step-by-step explanation:
87
Recursive formula is: 
Explicit formula is: 
Step-by-step explanation:
Given sequence is:
15,11,7,3,-1
Here

First of all, we have to find the common difference
Common difference is the difference between consecutive terms of an arithmetic sequence
So,

<u>Recursive Formula:</u>
A recursive formula is used to find the next term of an arithmetic sequence using previous term and common difference
General form of recursive formula for a given common difference d is:

Putting the value of d

<u>Explicit Formula:</u>
The explicit formula is given by:

Putting the first term and common difference

Hence,
Recursive formula is: 
Explicit formula is: 
Keywords: Arithmetic sequence, common difference
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