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What is the common factor in (2x^2+5x)?

Answer and explanation

Correct answer: (x)

The direct answer is A: x. A common factor is a quantity that divides every term. The expression is \(2x^2+5x\). Rewrite the terms as \(2x\cdot x+5\cdot x\). Both terms contain x, so x is common and the expression can be factored as \(x(2x+5)\). Option A is therefore correct. Option B, 2x, is not common to both terms because 5x is not divisible by 2. Option C, 5x, is not common because 2x² is not divisible by 5. Option D, 10x, is larger than the numerical factors available and cannot divide either term in the required integer factorisation. Notice that 1 is also technically a common factor, but x is the intended greatest useful variable factor and is the only listed correct choice. Memory cue: compare numbers and variables separately; take only what appears in every term.

Related tags

Quadratic ExpressionsCommon FactorTerms

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