anonymous
  • anonymous
which of the following are polynomials that are perfect square trinomials: Answer 9x2 - 6x + 1 16x2 + 24x + 9 36b2 - 24b + 8 4a2 - 10a + 25
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Directrix
  • Directrix
A perfect square trinomial is the square of a binomial. To see what happens when we square any binomial, let us square (a + b): (a + b)² = (a + b)(a + b) = a² + 2ab + b² The square of any binomial produces the following three terms: 1. The square of the first term of the binomial: a² 2. Twice the product of the two terms: 2ab 3. The square of the second term: b²
anonymous
  • anonymous
you want to factor out the coefficient of x^2 from each term and see if half of the "b" term, that is the x term, squared is equal to the third term, or constant term
anonymous
  • anonymous
can someone just answer it for ,me I want to double check my answers

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anonymous
  • anonymous
which ones do you have?
Directrix
  • Directrix
9x2 - 6x + 1, 16x2 + 24x + 9
anonymous
  • anonymous
the last 3
anonymous
  • anonymous
the first one works because after factoring out a 9 from each term you are left with: 9(x^2-2/3x+1/9) [1/2(2/3)]^2=1/9
anonymous
  • anonymous
so the first one is right?
anonymous
  • anonymous
first one is one answer. use the same logic to check the others
anonymous
  • anonymous
I think second one is right
anonymous
  • anonymous
yep
anonymous
  • anonymous
and the last one is right?
anonymous
  • anonymous
yep, 3rd one doesnt work
anonymous
  • anonymous
actually last one is wrong too, sorry
anonymous
  • anonymous
wait im confused which one is right 3rd one or last one?
anonymous
  • anonymous
4(a^2-5/2a+25/4) (5/4)^2 doesn't equal 25/4
anonymous
  • anonymous
neither
anonymous
  • anonymous
mmk so the first 2 r right and last 2 r wrong?
anonymous
  • anonymous
yes
Directrix
  • Directrix
9x2 - 6x + 1 and 16x2 + 24x + 9

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