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If a quadratic trinomial is of the form \(x^2+2ax+a^2\), which algebraic expression is it equal to?

Answer and explanation

Correct answer: \((x+a)^2\)

Expanding \((x+a)^2\) gives \(x^2+2ax+a^2\), so it is the required perfect-square form. In \((x-a)^2\), the middle term is \(-2ax\). Exam tip: use the sign of the middle term to identify the square.

Related tags

Algebraic IdentitiesQuadratic ExpressionsPerfect Square TrinomialBinomial SquareClass 9 MathematicsExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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