anonymous
  • anonymous
What is factored version of b^2-16
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
jim_thompson5910
  • jim_thompson5910
hint1: 16 is a perfect square; 16 = 4^2 hint2: a^2 - b^2 = (a-b)*(a+b) is the difference of squares rule
anonymous
  • anonymous
B-4 ??
jim_thompson5910
  • jim_thompson5910
that's part of it

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More answers

anonymous
  • anonymous
(B-4)(b-4) ??
jim_thompson5910
  • jim_thompson5910
example: 9x^2 - 25 = (3x)^2 - 5^2 = (3x-5)(3x+5)
jim_thompson5910
  • jim_thompson5910
(b-4)(b-4) is close but not quite there
anonymous
  • anonymous
(B-4)(b+4)
jim_thompson5910
  • jim_thompson5910
yes
jim_thompson5910
  • jim_thompson5910
I recommend expanding that out to confirm the answer
anonymous
  • anonymous
Thank you :) can you help with a couple more??
jim_thompson5910
  • jim_thompson5910
sure
anonymous
  • anonymous
Y^2-2y-15 Would it be (y-5)(y+3) ?
jim_thompson5910
  • jim_thompson5910
you are correct
anonymous
  • anonymous
Okay :) what about 3x^2+9x?
jim_thompson5910
  • jim_thompson5910
hint: factor out the GCF
anonymous
  • anonymous
Would it be (x+3)^2
jim_thompson5910
  • jim_thompson5910
hint: \[\Large 3x^2 + 9x\] \[\Large 3x*x + 3x*3\] \[\Large \color{red}{3x}*x + \color{red}{3x}*3\]
anonymous
  • anonymous
X+3 ??
jim_thompson5910
  • jim_thompson5910
do you see how there's the common factor of 3x? we can factor it out to get 3x(x+3) if you distribute the 3x back in, you should get the original expression back
anonymous
  • anonymous
X^2+3
jim_thompson5910
  • jim_thompson5910
|dw:1442547042355:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1442547055091:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1442547069453:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1442547082026:dw|
anonymous
  • anonymous
I understand that
jim_thompson5910
  • jim_thompson5910
ok great
anonymous
  • anonymous
Could you explain how to find the answer?
anonymous
  • anonymous
Wait is the answer 3x(x+3) ??
jim_thompson5910
  • jim_thompson5910
yeah it's as factored as much as possible
anonymous
  • anonymous
Thank you :) I have 3 more questions for you okay?
jim_thompson5910
  • jim_thompson5910
ok start a new question to avoid clutter
anonymous
  • anonymous
Okay

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