Mathematics
Grade 9
15 min
Divide monomials
Divide monomials
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1
Introduction & Learning Objectives
Learning Objectives
Identify the coefficient, variable(s), and exponent(s) in a monomial.
Apply the Quotient of Powers rule to divide terms with the same base.
Divide the numerical coefficients of two monomials.
Simplify expressions involving the division of monomials with single or multiple variables.
Correctly apply the Zero Exponent rule when a variable term is divided by itself.
Correctly apply the Negative Exponent rule to express final answers with positive exponents.
Ever see a giant, messy fraction with letters and exponents and wonder how to simplify it? 🤔 Let's learn the secret to shrinking them down to size!
This tutorial will teach you the step-by-step process for dividing monomials. Mastering this skill is crucial as it forms the foundation for simplifyin...
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Key Concepts & Vocabulary
TermDefinitionExample
MonomialAn algebraic expression consisting of a single term, which can be a number, a variable, or a product of numbers and variables with whole number exponents.7x²y is a monomial.
CoefficientThe numerical factor of a term.In the monomial 7x²y, the coefficient is 7.
BaseThe number or variable that is being raised to a power.In the term x⁵, the base is x.
ExponentA number that indicates how many times the base is used as a factor (multiplied by itself).In the term x⁵, the exponent is 5.
QuotientThe result obtained by dividing one quantity by another.The quotient of 10 ÷ 2 is 5.
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Core Formulas
Quotient of Powers Rule
For any non-zero number x and integers a and b: \frac{x^a}{x^b} = x^{a-b}
When dividing two powers with the same base, you keep the base and subtract the exponents (numerator exponent minus denominator exponent).
Zero Exponent Rule
For any non-zero number x: x^0 = 1
Any non-zero base raised to the power of zero equals 1. This often occurs when you divide a term by itself, like \frac{x^3}{x^3} = x^{3-3} = x^0 = 1.
Negative Exponent Rule
For any non-zero number x and integer n: x^{-n} = \frac{1}{x^n}
A base raised to a negative exponent is equal to the reciprocal of the base raised to the positive exponent. This is used to write final answers without negative exponents.
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Challenging
Simplify the expression: \(\frac{48a^{-2}b^5}{8a^3b^{-1}}\)
A.\(\frac{6b^4}{a}\)
B.\(6a^{-5}b^6\)
C.\(\frac{6b^6}{a^5}\)
D.\(\frac{6a^5}{b^6}\)
Challenging
The expression \(\frac{24x^a y^b}{6x^3 y^8}\) simplifies to \(\frac{4x^2}{y^3}\). What are the values of a and b?
A.a = 5, b = 5
B.a = 6, b = 11
C.a = 1, b = -3
D.a = 5, b = -5
Challenging
Perform the following operation: \(\frac{ (\frac{40x^8y^6}{5x^2y^3}) }{2xy}\)
A.\(4x^5y^2\)
B.\(8x^6y^3\)
C.\(4x^7y^4\)
D.\(16x^5y^2\)
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