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25 March, 20:08

Which trinomials are perfect square trinomials?

Select each correct answer.

A. m^2 + 10m + 100

B. m^2 + 10m + 25

C. m^2 + 36m + 60

D. m^2 + 24m + 144

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Answers (1)
  1. 25 March, 21:53
    0
    Perfect square is

    a²+2ab+b²

    so just take the square root of the end ones and add then double to get middle term

    A.

    m+10=10m, doubled is 20m

    nope

    B.

    m+5=5m, doubled is 10m, yep

    C.

    m+2√15=fancy thing that won't get to 36m

    D.

    m+12=12m, doubled is 24m, yep

    B and D
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