-1
x + y =10
xy = -11
x +y = 10
y =10-x
x(10-x) = -11
10x - x^2 + 11 = 0
x^2 -10x - 11 = 0
(x-11)(x+1) = 0
x = 11
y = -1
34
34
7 & 3
-82
There are no prime numbers greater than 10 that add up to 29. Since all prime numbers greater than 2 are odd numbers, no two prime numbers greater than 2 can have an even number for their sum.
5 5
175
-56
45 and 10
34
-56
-56
-1
34
10 and 20, among others. -- Pick any multiple of 10. -- Add 10 to it. -- There you have two numbers whose GCF is 10.
260
15