anonymous
  • anonymous
5. Multiply. (3x + 5)(3x – 5) (1 point) 9x2 – 30x – 25 9x2 + 30x + 25 9x2 – 25 9x2 + 25 6. The area of a rectangular painting is given by the trinomial x2 – 5x – 36. What are the possible dimensions of the painting? Use factoring. (1 point) (x + 9) and (x – 4) (x + 9) and (x + 4) (x – 9) and (x – 4) (x – 9) and (x + 4)
Mathematics
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anonymous
  • anonymous
5. Multiply. (3x + 5)(3x – 5) (1 point) 9x2 – 30x – 25 9x2 + 30x + 25 9x2 – 25 9x2 + 25 6. The area of a rectangular painting is given by the trinomial x2 – 5x – 36. What are the possible dimensions of the painting? Use factoring. (1 point) (x + 9) and (x – 4) (x + 9) and (x + 4) (x – 9) and (x – 4) (x – 9) and (x + 4)
Mathematics
chestercat
  • chestercat
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pooja195
  • pooja195
FOIL
pooja195
  • pooja195
for number 5
pooja195
  • pooja195
(3x)(3x)+(3x)(−5)+(5)(3x)+(5)(−5)

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anonymous
  • anonymous
i dont know how to do that
pooja195
  • pooja195
thats 3x times 3x
pooja195
  • pooja195
*whats
anonymous
  • anonymous
9
pooja195
  • pooja195
1 Attachment
pooja195
  • pooja195
Once you multiply you get this 9x2−15x+15x−25
pooja195
  • pooja195
Combine LIKE TERMS
anonymous
  • anonymous
is it 9x2 – 30x – 25
pooja195
  • pooja195
no -15+15 = 0
pooja195
  • pooja195
9x2−25
shaik0124
  • shaik0124
5 answer 9x2 – 25
pooja195
  • pooja195
x2 – 5x – 36. What numbers multiply to get -36 and add to -5
shaik0124
  • shaik0124
the question in the form (a+b)(a-b)=a^2-b^2 similarly (3x+5)(3x-5)=(3x)^2-5^2
Jack1
  • Jack1

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