0 reads0 ratings0 helpful
Which of the following expressions can be classified as a difference of squares?
Advertisement
Answer and explanation
Correct answer: \(49a^2-16b^2\)
In A, \(49a^2=(7a)^2\) and \(16b^2=(4b)^2\), with a minus sign between them. Hence it has the form \(U^2-V^2\). Option B is a sum. Exam tip: check for two square terms separated by a minus sign.
Frequently asked questions
What is the correct answer to this question?
\(49a^2-16b^2\)
Why is this the correct answer?
In A, \(49a^2=(7a)^2\) and \(16b^2=(4b)^2\), with a minus sign between them. Hence it has the form \(U^2-V^2\). Option B is a sum. Exam tip: check for two square terms separated by a minus sign.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Exploring Algebraic Identities. Topic: Factorisation.
Student feedback
Was this question useful?
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Difficulty
Easy0%
Medium0%
Hard0%
Was the explanation clear?
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
Advertisement