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# 1: Algebra Fundamentals

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• 1.1: Review of Real Numbers and Absolute Value
Algebra is often described as the generalization of arithmetic. The systematic use of variables, letters used to represent numbers, allows us to communicate and solve a wide variety of real-world problems. For this reason, we begin by reviewing real numbers and their operations.
• 1.2: Operations with Real Numbers
The result of adding real numbers is called the sum and the result of subtracting is called the difference. Given any real numbers a, b, and c, we have the following properties of addition: Additive Identity Property,  Additive Inverse Property, Associative Property, Commutative Property
• 1.3: Square and Cube Roots of Real Numbers
A square root of a number is a number that when multiplied by itself yields the original number.  A cube root of a number is a number that when multiplied by itself three times yields the original number.
• 1.4: Algebraic Expressions and Formulas
In algebra, letters called variables are used to represent numbers. Combinations of variables and numbers along with mathematical operations form algebraic expressions, or just expressions.
• 1.5: Rules of Exponents and Scientific Notation
In this section, we review the rules of exponents. Recall that if a factor is repeated multiple times, then the product can be written in exponential form xⁿ. The positive integer exponent n indicates the number of times the base x is repeated as a factor.
• 1.6: Polynomials and Their Operations
A polynomial is a special algebraic expression with terms that consist of real number coefficients and variable factors with whole number exponents.
• 1.7: Solving Linear Equations
An equation is a statement indicating that two algebraic expressions are equal. A linear equation with one variable, x , is an equation that can be written in the standard form ax+b=0 where a and b are real numbers and a≠0 . A solution to a linear equation is any value that can replace the variable to produce a true statement.
• 1.8: Solving Linear Inequalities with One Variable
A linear inequality is a mathematical statement that relates a linear expression as either less than or greater than another. A solution to a linear inequality is a real number that will produce a true statement when substituted for the variable. Linear inequalities have either infinitely many solutions or no solution. If there are infinitely many solutions, graph the solution set on a number line and/or express the solution using interval notation.
• 1.E: Algebra Fundamentals (Exercises)