Which of the trinomials below is a perfect square of a binomial? Select the correct answer below: $16x^2 + 12x + 9$ $9x^2 - 9x + 1$ $16x^2 + 40x + 25$ $25x^2 - 80x + 16$ $-2x^2 + 4x - 1$
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The general form is $a^2 + 2ab + b^2 = (a+b)^2$ or $a^2 - 2ab + b^2 = (a-b)^2$. Show more…
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