Mathematics
Grade 11
15 min
Simplify variable expressions using properties
Simplify variable expressions using properties
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1
Introduction & Learning Objectives
Learning Objectives
Apply the distributive property to complex expressions involving multiple variables and rational exponents.
Combine like terms in advanced polynomial and rational expressions.
Utilize properties of exponents (product, quotient, power, negative, rational) to simplify multi-term expressions.
Simplify expressions involving radicals by applying properties of roots and rationalizing denominators.
Condense and expand logarithmic expressions using the product, quotient, and power rules for logarithms.
Recognize and apply special factoring patterns, such as the difference of squares and sum/difference of cubes, to simplify expressions.
Ever see a massive equation and feel overwhelmed? 🤯 What if you could use a set of 'cheat codes' to shrink it down to...
2
Key Concepts & Vocabulary
TermDefinitionExample
Like TermsTerms that have the exact same variables raised to the exact same powers. Only the coefficients can be different.In the expression `5x^2y - 3xy^2 + 2x^2y`, the terms `5x^2y` and `2x^2y` are like terms.
Distributive PropertyA property that states multiplying a sum by a number is the same as multiplying each addend by the number and then adding the products.`a(b + c) = ab + ac`. For example, `3x(x^2 - 4) = 3x^3 - 12x`.
Properties of ExponentsA set of rules that govern how to perform operations with exponential expressions, including those with rational or negative exponents.Product Rule: `x^m * x^n = x^{m+n}`. For example, `x^{1/2} * x^{1/3} = x^{5/6}`.
Properties of LogarithmsRules that allow for the manipulation of logarithmic expressions, primarily used to...
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Core Formulas
Key Exponent Properties
1. Product Rule: `x^a * x^b = x^{a+b}` \n2. Quotient Rule: `x^a / x^b = x^{a-b}` \n3. Power Rule: `(x^a)^b = x^{ab}` \n4. Negative Exponent: `x^{-a} = 1/x^a`
Use these rules to simplify expressions involving multiplication, division, and powers of terms with exponents. They are especially critical for handling fractional and negative exponents.
Key Logarithm Properties
1. Product Rule: `log_b(MN) = log_b(M) + log_b(N)` \n2. Quotient Rule: `log_b(M/N) = log_b(M) - log_b(N)` \n3. Power Rule: `log_b(M^p) = p * log_b(M)`
These properties are used to condense a sum or difference of logarithms into a single logarithm, or to expand a single logarithm into multiple terms. The base `b` must be the same for all logs.
Difference of Squares
`a^2 - b^2 = (a...
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Easy
In the expression `8a^3b^2 - 3a^2b^3 + 5a^3b^2`, which terms are considered 'like terms'?
A.All three terms are like terms.
B.`8a^3b^2` and `5a^3b^2`
C.`8a^3b^2` and `-3a^2b^3`
D.` -3a^2b^3` and `5a^3b^2`
Easy
According to the distributive property, which expression is equivalent to `a(b + c)`?
A.ab + c
B.a + b + c
C.ab + ac
D.a(b) + c
Easy
Simplify the expression `z^5 * z^2` using the properties of exponents.
A.z^10
B.z^3
C.2z^7
D.z^7
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