Ashley’s math average decreased 12 points to 78. Then she completed an extra credit assignment and raised her final average by 5
3 answers:
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Answer:
.
Step-by-step explanation:
Fact:
.
In other words, , the difference of two squares in the form
and
, could be factorized into
.
In this question, the expression is the difference between two terms:
and
.
is the square of
. That is:
.
- On the other hand,
.
Hence:
.
Apply the fact that to factorize this expression. (In this case,
whereas
.)
.