Class 9 Mathematics · Chapter 4 · Test 4
Square Roots
36 MCQs
36 questions · 35 min · 36 marks
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Sample questions
The first 5 of 36. Try each one, then tap to see the answer.
Question 1
The square root of an algebraic expression is an expression that:
- Awhen added to itself gives the expression
- Bwhen multiplied by 2 gives the expression
- Cis the reciprocal of the expression
- Dwhen multiplied by itself gives the expression
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Answer: D
A square root multiplied by itself gives the original expression.
Question 2
The square roots of 4a² are:
- A2a only
- B2a and −2a
- C4a and −4a
- Da² and −a²
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Answer: B
2a × 2a = 4a² and (−2a) × (−2a) = 4a².
Question 3
The square root of an algebraic expression can be found by:
- Afactorization and division methods
- Baddition and subtraction
- Conly graphs
- Donly the HCF method
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Answer: A
The two methods taught are factorization and division.
Question 4
The square root of x² − 6x + 9 is:
- A±(x + 3)
- B±(x² − 3)
- C±(x − 3)
- D±(x² + 9)
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Answer: C
x² − 6x + 9 = (x − 3)² so its square root is ±(x − 3).
Question 5
The square root of x² + 2x + 1 is:
- A±(x − 1)
- B±(x + 1)
- C±(x² + 1)
- D±(2x + 1)
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Answer: B
x² + 2x + 1 = (x + 1)².
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