math

what is the third term necessary to make this a perfect square trinomial?
what is the binomial quantity squared it is equivalent to?

x^2 - 9x _______= (________)^2

x^2 + 10x _______= (________)^2

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asked by lauren
  1. since (a-b)^2 = a^2-2ab+b^2, just divide the middle coefficient by 2 and square it.

    (9/2)^2

    and

    5^2

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    posted by Steve

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