Mathematics
Grade 8
15 min
Multiply polynomials
Multiply polynomials
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Identify monomials and polynomials.
Apply the Product Rule for Exponents when multiplying terms.
Multiply a monomial by a polynomial using the Distributive Property.
Multiply two binomials using the Distributive Property or methods like FOIL.
Multiply a binomial by a trinomial using the Distributive Property.
Simplify expressions involving polynomial multiplication by combining like terms.
Ever wondered how architects calculate the area of complex-shaped rooms or how engineers design circuits? 📐 It often involves multiplying expressions with variables!
In this lesson, you'll learn the fundamental rules and techniques for multiplying different types of polynomials. Mastering this skill is crucial for solving more advanced algebraic problems and unde...
2
Key Concepts & Vocabulary
TermDefinitionExample
TermA single number, variable, or product of numbers and variables.$5x^2$, $-3y$, $7$
MonomialA polynomial with only one term.$4x^3$, $-7y$, $12$
PolynomialAn expression consisting of variables and coefficients, involving only the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables.$3x^2 + 2x - 5$
CoefficientThe numerical factor of a term.In $5x^2$, the coefficient is $5$.
Product Rule for ExponentsWhen multiplying powers with the same base, add the exponents.$x^2 \cdot x^3 = x^{2+3} = x^5$
Distributive PropertyA property that states that multiplying a sum by a number is the same as multiplying each addend by the number and then adding the products.$a(b+c) = ab + ac$
BinomialA polynomial with exactly two terms.$x+3$, $...
3
Core Formulas
Product Rule for Exponents
$x^a \cdot x^b = x^{a+b}$
When multiplying terms with the same base, keep the base and add the exponents. This rule is fundamental for multiplying the variable parts of terms.
Distributive Property
$a(b+c) = ab + ac$
To multiply a monomial by a polynomial, multiply the monomial by each term inside the polynomial. This rule extends to multiplying any two polynomials, where each term of the first polynomial is multiplied by each term of the second.
Multiplying Monomials
$(Ax^a)(Bx^b) = (A \cdot B)x^{a+b}$
To multiply two monomials, multiply their coefficients and add the exponents of their like bases. This is the basic building block for all polynomial multiplication.
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Sign Up Free to ContinueSample Practice Questions
Easy
According to the Product Rule for Exponents, what is the simplified form of $x^3 \cdot x^6$?
A.x^18
B.x^9
C.2x^9
D.x^3
Easy
What is the product of the monomials $(4y^2)$ and $(5y^4)$?
A.9y^6
B.20y^8
C.9y^8
D.20y^6
Easy
Which property is used to multiply a monomial by a polynomial, such as in the expression $3x(x+4)$?
A.Distributive Property
B.Commutative Property
C.Associative Property
D.Product Rule for Exponents
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