0 reads0 ratings0 helpful
Which is the correct expansion of ( (x+3)(x-4) )?
Advertisement
Answer and explanation
Correct answer: \(x^2-x-12\)
Using the distributive property, \((x+3)(x-4)=x^2-4x+3x-12=x^2-x-12\). Therefore, option B is correct. In option A, \(-4x+3x\) has incorrectly been simplified as \(+x\). Exam tip: check the signs carefully before combining like terms.
Frequently asked questions
What is the correct answer to this question?
\(x^2-x-12\)
Why is this the correct answer?
Using the distributive property, \((x+3)(x-4)=x^2-4x+3x-12=x^2-x-12\). Therefore, option B is correct. In option A, \(-4x+3x\) has incorrectly been simplified as \(+x\). Exam tip: check the signs carefully before combining like terms.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Exploring Algebraic Identities. Topic: Algebraic identities.
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