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Summary The Magic of Algebraic Expressions
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Description: Building and simplifying algebraic expressions, combining like terms, and using the distributive property.
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Chapter 7: The Magic of AlgebraicExpressions
Algebraic expressions are the essence of algebra, allowing
mathematicians to succinctly represent complex numerical
relationships. This chapter delves into building and simplifying
algebraic expressions, combining like terms, and the
distributive property, which are pivotal in understanding and
manipulating algebraic equations.
Building and Simplifying Algebraic
Expressions
An algebraic expression is a mathematical phrase that can
include numbers, variables, and operation symbols. Simplifying
these expressions is a key skill in algebra. It involves combining
like terms (terms that have the same variable part) and
applying mathematical operations to make the expression as
concise as possible.
For instance, in the expression \( 3x + 4x - 5 \), we combine the
like terms \( 3x \) and \( 4x \) to get \( 7x - 5 \). This simplified
form is easier to work with in equations and problem-solving.
Combining Like Terms
Combining like terms is the process of adding or subtracting
terms that have the same variables to simplify an expression.
For example, in the expression \( 5y + 3 - 2y + 8 \), the like
terms \( 5y \) and \( -2y \) can be combined to \( 3y \), and the
constants 3 and 8 combine to 11, simplifying the expression to
\( 3y + 11 \).
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