Class 8 Maths – Chapter 9

Algebraic Expressions & Identities

STEP 3: Multiple Choice Questions (MCQs)

1. Which of the following is a monomial?

A) x + 3
B) x² + x
C) 5x
D) x² + 2x + 1

Answer: C) 5x

2. The number of terms in the expression 3x² − 5x + 7 is:

A) 1
B) 2
C) 3
D) 4

Answer: C) 3

3. The coefficient of x in the expression 7x − 4 is:

A) 7
B) −4
C) x
D) 1

Answer: A) 7

4. Using identity, (a + b)² equals:

A) a² + b²
B) a² − b²
C) a² + 2ab + b²
D) a² − 2ab + b²

Answer: C) a² + 2ab + b²

5. Which identity represents (x − y)(x + y)?

A) x² + y²
B) x² − y²
C) (x − y)²
D) (x + y)²

Answer: B) x² − y²

6. The constant term in the expression 4x² + 3x − 9 is:

A) 4
B) 3
C) −9
D) x

Answer: C) −9