Multiple Choice Question (MCQ)

Evaluate the expression: 4a^2-4ab+b^2, when a = 2 and b = 5

  1. ×

    -14

  2. 1

  3. ×

    81

  4. ×

    16

Collected in the board: Calculate algebraic expressions

Steven Zheng posted 4 hours ago

Answer

  1. Apply perfect square formula to the expression

    4a^2-4ab+b^2

    =(2a-b)^2

    Substitute the value of a = 2 and b = 5 , then

    (2\times 2-5)^2 = 1

    B is correct

Steven Zheng posted 4 hours ago

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