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Which feature of the quadratic expression \(x^2+10x+25\) shows that it can be written as \((x+5)^2\)?

Answer and explanation

Correct answer: The middle term \(10x\) equals \(2\cdot x\cdot5\)

Here, \(x^2=(x)^2\) and \(25=5^2\). Since the middle term is \(2\cdot x\cdot5=10x\), it matches \(a^2+2ab+b^2\). Exam tip: always check the sign of the middle term too.

Related tags

Algebraic IdentitiesQuadratic ExpressionsPerfect Square TrinomialClass 9 MathematicsBinomial SquareExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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