Expanding and simplifying
Expand a single bracket and collect like terms; expand the product of two binomials; expand and simplify expressions with two pairs of brackets.
Worked examples
Expanding a single bracket and collecting like terms
Straightforward
Problem
Expand and simplify .
1
Expand the bracket using the distributive law.
2
Rewrite the full expression with the bracket expanded.
3
Collect like terms — add the terms together.
Answer
Expanding the product of two binomials
Moderate
Problem
Expand and simplify .
1
Multiply the first term in the first bracket by each term in the second bracket.
and
2
Multiply the second term in the first bracket by each term in the second bracket.
and
3
Write all four products, then collect like terms.
Answer
Expanding and simplifying two pairs of brackets
Challenging
Problem
Expand and simplify .
1
Expand the first pair of brackets.
2
Expand the second bracket.
3
Write both expanded parts together.
4
Collect like terms.
Answer
Practise
Q1·Straightforward
Expand and simplify . What is the coefficient of ?
Explanation
Expanding: . Rewriting: . Collecting like terms: , so the expression is . The coefficient of is .
Q2·Straightforward
Expand and simplify .
Explanation
Expanding: . Rewriting: . Collecting like terms: , giving .
Q3·Straightforward
Expand and simplify . What is the constant term?
Explanation
Expanding: . Rewriting: . Collecting like terms: , so the expression is . The constant term is .
Q4·Straightforward
Expand and simplify . What is the coefficient of ?
Explanation
Expanding: . Rewriting: . Collecting like terms: , so the expression is . The coefficient of is .
Q5·Moderate
Expand . What is the coefficient of ?
Explanation
Using the distributive law: . The coefficient of is .
Q6·Moderate
Expand . What is the constant term?
Explanation
. The constant term is .
Q7·Moderate
Expand . What is the coefficient of ?
Explanation
. The coefficient of is .
Q8·Moderate
Expand . What is the coefficient of ?
Explanation
. The coefficient of is .
Q9·Challenging
Expand and simplify . What is the coefficient of ?
Explanation
First bracket: . Second bracket: . Adding: . The coefficient of is .
Q10·Challenging
Expand and simplify . What is the constant term?
Explanation
First bracket: . Second bracket: . Adding: . The constant term is .
Q11·Challenging
Expand and simplify . What is the coefficient of ?
Explanation
First bracket: . Subtracting: . Adding: . The coefficient of is .
Q12·Challenging
Expand and simplify . What is the coefficient of ?
Explanation
First bracket: . Second bracket: . Adding: . The coefficient of is .
Open Math
Expanding and simplifying
Algebra · MA4-ALG-C-01
Name:
Date:
Q1Straightforward
Expand and simplify . What is the coefficient of ?
Q2Straightforward
Expand and simplify .
- A.
- B.
- C.
- D.
Q3Straightforward
Expand and simplify . What is the constant term?
Q4Straightforward
Expand and simplify . What is the coefficient of ?
Q5Moderate
Expand . What is the coefficient of ?
Q6Moderate
Expand . What is the constant term?
Q7Moderate
Expand . What is the coefficient of ?
Q8Moderate
Expand . What is the coefficient of ?
Q9Challenging
Expand and simplify . What is the coefficient of ?
Q10Challenging
Expand and simplify . What is the constant term?
Q11Challenging
Expand and simplify . What is the coefficient of ?
Q12Challenging
Expand and simplify . What is the coefficient of ?
Worked solutions and answers at openmath.au/year-8/algebraic-techniques/expanding-and-simplifying