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Why is (a - b) ^ 2 = a ^ 2 - 2ab + b ^ 2 also an expansion of a perfect square ? doch algebraic eypression

Respuesta :

There's no deep meaning behind the equality you're asking about, it's just the result of a computation:

[tex](a-b)^2=(a-b)(a-b)=a^2-ab-ab+b^2=a^2-2ab+b^2[/tex]

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