5 - 6 = -1
2 + 7 = 9
-1 × 9 = -9
-9 would be the simplified answer.
Hope this helps!
Answer:

Step-by-step explanation:

The degree of the sum and difference of the polynomials are 6 and 7 respectively.
given polynomials are:


the sum of polynomials = 
the difference of polynomials = 
<h3>what is the degree of a polynomial?</h3>
A polynomial's degree is the highest or the greatest power of a variable in a polynomial equation.
degree of sum = monomial with highest power = 5+1=6
degree of difference = monomial with highest power = 3+4 = 7
therefore, the degree of the sum and difference of the polynomials are 6 and 7 respectively.
to get more about polynomials refer to:
brainly.com/question/1600696
Let

. Then

Meanwhile, since

, you have

.
It follows that

,

, and

, so that the quadratic fit for

that satisfies the given points is

Note that this is just the second-order Taylor polynomial for

about

.
The measure of
is 68 degrees
<h3>How to solve the angle?</h3>
The complete question is in the attached image
The value of
is calculate using the following cosine function

Evaluate the quotient'

Take the arc cos of both sides

Evaluate the arc cos

Approximate to the nearest degree

Hence, the measure of
is 68 degrees
Read more about right triangles at:
brainly.com/question/2437195
#SPJ1