G8-MATH-L14 Factorisation

What are the prime factors of 30?

• 2, 3, 5
• 1, 2, 3, 5
• 6, 10, 15
• All of the above

Which of the following is the irreducible form of the expression 5xy?

• 5 × x × y
• 5xy
• 5 × (xy)
• None of the above

What is the prime factor form of 70?

• 2 × 5 × 7
• 5 × 14
• 10 × 7
• All of the above

In the expression 3x(x + 2), which of the following is NOT a factor?

• 3
• x
• x + 2
• 2

What is the first step in factorising the expression 2x + 4?

• Combine like terms
• Identify common factors
• Use the distributive law
• Regroup the expression

Which expression is already in factor form?

• 2x + 4
• 3xy
• x² + 5x + 6
• 5x + 10

What is the result of factorising 5xy + 10x?

• 5x(y + 2)
• 10x(y + 2)
• 5(y + 2)
• 5xy + 10

What does regrouping allow us to do in factorisation?

• Combine all terms
• Identify common factors easily
• Change the order of operations
• None of the above

Which of the following is a method of factorisation?

• Common factors
• Regrouping
• Using identities
• All of the above

If an expression fits the form of an identity, what can we do?

• Ignore it
• Use it to factorise
• Add more terms
• Change its variables