A math problem in the second volume of the seventh grade people's Education Press In addition to an internal angle, the sum of the other internal angles of a polygon is 2750 degrees. What are the internal angles and the variables of the polygon?

130,18
The sum of the exterior angles of a polygon is 360, and one interior angle plus one exterior angle is 180
2750 + 360 + x = 180 * 18 (18 comes from PEI) (x is an unknown interior angle)
Calculate x = 130
The number of sides is 18. Just check it

1. If X & # 178; + kxy + 16 is a complete square formula, then k =?
2. If x = - 2, the value of the polynomial ax ^ 5 + BX & # 179; + CX-1 is 5, then when x = 2, the value of the polynomial is?
(2 + 1) (2 + 178; + 1) (2 ^ 4 + 1) （2³²+1）+1

1. Plus or minus 8
2. When x = - 2, the value of the polynomial ax ^ 5 + BX & # 179; + CX-1 is 5
a(-2)^5+b(-2)^3+c(-2)-1=5
-a*2^5-b*2^3-2c=6
When x = 2, ax ^ 5 + BX & # 179; + CX-1 = a * 2 ^ 5 + b * 2 ^ 3 + 2c-1 = - 7
3. The original formula = (2-1) (2 + 1) (2 & # 178; + 1) (2 ^ 4 + 1) （2³²+1）+1
=(2²-1)（2²+1）（2^4+1）… （2³²+1）+1
=...=(2^64-1)+1=2^64

1998²-1998·3994+1997²
(2+1)(2²+1)(2^4+1)(2^8+1)+1
Given x + y = 10, xy = 24, find X & sup2; + Y & sup2;
Given x + y = 3, X & sup2; + Y & sup2; = 5, what is the value of XY?
Given: a + 1 / a = 1, find the value of a & sup2; + 1 / A & sup2
5 questions in total

Question 1
Question 2 65536
Question 3 52
Question 4 2
The fifth problem has no solution condition (it can't be established in the range of real number)
Or - 1

A math problem in the second volume of the seventh grade people's Education Press In addition to an internal angle, the sum of the other internal angles of a polygon is 2750 degrees. What are the internal angles and the variables of the polygon?