What is the correct expansion of the first two factors in ( (x+6)(x-4)(x+1) )?
Answer and explanation
Correct answer: \(x^2+2x-24\)
Multiply the first two factors: \((x+6)(x-4)=x^2-4x+6x-24=x^2+2x-24\). Therefore, option A is correct. In option B, the middle term is incorrect, while option D has the wrong sign for the constant term. Exam tip: when multiplying two binomials, check the sum of the inner and outer terms for the middle term.
Frequently asked questions
What is the correct answer to this question?
\(x^2+2x-24\)
Why is this the correct answer?
Multiply the first two factors: \((x+6)(x-4)=x^2-4x+6x-24=x^2+2x-24\). Therefore, option A is correct. In option B, the middle term is incorrect, while option D has the wrong sign for the constant term. Exam tip: when multiplying two binomials, check the sum of the inner and outer terms for the middle term.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Exploring Algebraic Identities. Topic: Algebraic identities.
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