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What is the expansion of ((x-2)(x^2+2x+4))?
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Answer and explanation
Correct answer: (,x^3-8,)
This matches ((a-b)(a^2+ab+b^2)=a^3-b^3), so the answer is (x^3-8). In exams, identifying the identity makes expansion faster.
Frequently asked questions
What is the correct answer to this question?
(,x^3-8,)
Why is this the correct answer?
This matches ((a-b)(a^2+ab+b^2)=a^3-b^3), so the answer is (x^3-8). In exams, identifying the identity makes expansion faster.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Polynomials. Topic: Operations on real numbers and the laws of exponents.
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