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Elementary Algebra Review Sheet

and Common Formulas


Elementary Algebra Review Sheet
Basic Rules of Algebra Properties of Negation
Commutative Property of Addition Multiplication by -1
     a + b = b + a    eqn131.gif (325 bytes)          
Commutative Property of Multiplication Placement of Minus Signs
     eqn125.gif (384 bytes)    eqn132.gif (384 bytes)
Associative property of Addition Product of Two Opposites
     (a + b) + c = a + (b + c)     eqn133.gif (243 bytes)
Associative Property of Multiplication Operations with Fractions
    eqn127.gif (250 bytes)     eqn137.gif (316 bytes)
Left Distributive Property

    eqn126.gif (271 bytes)  

    
Right Distributive Property

     eqn128.gif (266 bytes)

    eqn138.gif (682 bytes)
Additive Identity Property

  a + 0 = a

    
Multiplicative Identity Property Properties of Exponents
   eqn129.gif (198 bytes)     a0 = 1
Additive Inverse Property     eqn134.gif (304 bytes)
     a + (-a) = 0

Multiplicative Inverse Property

    
   eqn130.gif (286 bytes)     
Properties of Equality     eqn135.gif (271 bytes)
Addition Property of Equality     eqn136.gif (314 bytes)
     If a = b, then a + c = b + c.     
Multiplication Property of Equality Special Products
    If a = b, then ac = bc. Square of a Binomial
Cancellation Property of Addition     eqn140.gif (383 bytes)
    If a + c = b + c, then a = b.     eqn141.gif (365 bytes)
Cancellation Property of Multiplication Difference of Two Squares
    eqn139.gif (435 bytes)     eqn142.gif (354 bytes)
Zero-Factor Property Difference of Two Cubes
    If ab = 0, then a = 0 or b = 0.     eqn143.gif (459 bytes)
Sum of Two Cubes
    eqn144.gif (466 bytes)
The Quadratic Formula
    eqn145.gif (425 bytes)
    eqn146.gif (406 bytes)
 
Common Formulas
Temperature Distance
         eqn148.gif (148 bytes)
    F = degrees Fahrenheit     d = distance traveled
    C = degrees Celsius     t = time
    r = rate
Simple Interest Compound Interest
    eqn147.gif (163 bytes)     
    I = interest     A = balance    
    P = principal      P = principal 
     r = annual interest rate          r = annual interest rate
     t = time in years      n = compoundings per year 
         t = time in years