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anonymous

  • 5 years ago

Which trinomial is not a perfect square ? #1)4x^2+ 4x+1 #2)x^2 +10x-25 or #3) 25-30x+9x^2

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  1. anonymous
    • 5 years ago
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    #3 is not a perfect square

  2. anonymous
    • 5 years ago
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    can you please show me how you got that answer?

  3. anonymous
    • 5 years ago
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    wait...its #2

  4. anonymous
    • 5 years ago
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    Because #1 factors out to (2x+1)^2 and #3 (-3x+5)^2 #2 does not factor out properly I miss read the +10 to be -10 other wise that one would have factored out to (x-5)^2 to make that one a perfect square you would need to add 50

  5. anonymous
    • 5 years ago
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    can you show me how you factored out #3

  6. anonymous
    • 5 years ago
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    First put it in proper order 9x^2-30x=25 Then Factor (-3x+5)(-3x+5) =(-3x+5)^2

  7. anonymous
    • 5 years ago
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    Sometimes it helps to see it as a^2 -2ab- b^2 That would look like -9x^2+(2)(-15x)+25 or -9x^2-15x-15x+25

  8. anonymous
    • 5 years ago
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    mmkay thank you soo much :)

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