Given integers $(-a)$ and $(-b)$ why is the product positive?
17515
Why is negative times negative = positive?
157733
Are positive real numbers $x,y$ allowed to be taken out during this proof?
153186
Positive integer type
75039
Smallest positive element of $ \{ax + by: x,y \in \mathbb{Z}\}$ is $\gcd(a,b)$
52542
For which odd positive integer $n$ , is it true that $-1$ is not a positive power of $2$ modulo $n$?
134330
Negative integer division surprising result
33542
When is $A- B = B- A$?
108021
What does the factorial of a negative number signify?
70006
$a,b,m,n$ be positive integers such that g.c.d.$(a,b)=1$ and $a^m+b^m|a^n+b^n$ , then $m|n$?
27754
Is integration from $a$ to $b$ same or $b$ to $a$ or is negative?
11127
Let $a$, $b$, and $c$ be positive real numbers.
15753
Solve the following equation in positive integers $x$ and $y$
63774
If a and b are odd integers, then $8\mid (a^2-b^2)$
71566
Positive and negative complex numbers?
8160
What is $\gcd(0,a)$, where $a$ is a positive integer?
122786
C: The Math Behind Negatives and Remainder
20593
Show that if $a \neq b$ and a and b are positive then $\frac{a}{b}+\frac{b}{a}$ is never an integer