Answer:
x =
7
Step-by-step explanation:
= 49
can equal 7 or -7
7 x 7 = 49. -7 x -7 = 49
The matrix

has eigenvalues
such that





for all values of
, so we need to have
in order for
to be real-valued. This happens for

where
is any integer, and over the given interval we have
and
.
What’s the length of it ? My guess would probably be C , I need to see the length of the trapezoid , it’s segment of AB
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