# Properties

## Terms

undefined, object
copy deck
Adding the opposite the equal zero, and used to praove an opposite. (a+-a=0, a-a=0, and used to prove that if a is real, negative a is real)
multiplicative property of zero
To multiply by zero. [a(0)=0]
To change the order of an equation that uses addition or subtraction. (3+4=4+3)
transitive
Usually used at the end of a proof. To sum up. (if a=b, and b=c, then a=c)
definition of division
Rules for dividing fractions. [3/4=(3/4)/1=3(1/4)=3/4]
definition of subtraction
Just like switch-switch! [a+(-b)=a-b] Just Asking; doesn't switch switch go along with yellow-yellow?
distributive
To multiply a value through parenthesis. Only works if only additon and subtraction are in the parenthesis. [a(b+c)=ab+ac
multiplicative property of negative one
To multiply by negative one. [-1(a)=-a]
substitution
To replace a value or actually complete the given operations. ( if a=3, and a=b, then 3=b)
opposites in products
The rules of multiplying by integers. [-a(b)=-ab, a(b)=ab, and -a(-b)=ab]
hypothesis
To prove that any variable is real. (a, b, and c are real numbers.)
axiom of closure
If (ab) is real, then a+b is real. ( if 3+4=7 s real, 3(4)=12 is real)
in an equation using additon and subtraction, the order will remain the same but parenthesis groupings will change. [(1+2)+3=1=(2+3)]
multiplication property of equality
Multiplying the same quantity to both sides of an equation. (If a=b, then ac=bc)
symmetric
You can flip both sides of an equal side to still have a true eqation. (3=a, then a=3)
multiplicative inverse
To multiply by the reciprocal, and used to prove recirocals are real. [a(1/a)=1, and to prove that if a is real, then 1/a is real)
identity of multiplication
To multiply by 1. [a(1)=a]
subtraction property of equality
Subtracting the same quantity to both sides of an equation. (If a=b, then a-c=b-c)
reflexive
Looks exactily the same on both sides. (a=a)
division property of equality
Dividing the same quantity to both sides of an equation. (If a=b, then a/c=b/c)
reciprocal of a product
Seperating one fraction into two. [1/ab=1/a(1/b)]
commutative of multiplication
Changes the order of an eqation that uses multiplication and or division. [(3)4=(4)3]
associative of multiplication
in an equation using multiplication and division, the order will remain the same but parenthesis groupings will change. [2(3)4=(2)3(4)]
opposites of a sum
Like the distributive property, but used when only distributing a negative through. [-(a+3)=-a-3]