Bananas1234
  • Bananas1234
Factor the expression. c^2 + 4c – 4
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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alekos
  • alekos
Use the quadratic formula
triciaal
  • triciaal
|dw:1433310676635:dw|
triciaal
  • triciaal
|dw:1433310758978:dw|

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triciaal
  • triciaal
|dw:1433310845922:dw|
triciaal
  • triciaal
any questions?
Bananas1234
  • Bananas1234
here are my options: (c + 2)2 (c + 1)(c + 4) (c2 + 4)2 The expression cannot be factored because it is prime.
Bananas1234
  • Bananas1234
@triciaal
triciaal
  • triciaal
|dw:1433311170876:dw|
triciaal
  • triciaal
I had an error with the sign so it did not factor
triciaal
  • triciaal
but hope you understand the steps , please be more careful than I was
Bananas1234
  • Bananas1234
no problem!! :)
Bananas1234
  • Bananas1234
(c + 2)^2? @triciaal
jim_thompson5910
  • jim_thompson5910
Change all copies of 'c' to 'x' c^2 + 4c – 4 ---> x^2 + 4x – 4 x^2 + 4x – 4 is the same as 1x^2 + 4x – 4 so it is in the form ax^2 + bx + c where a = 1, b = 4, c = -4 ------------------------------------------------------- Plug a = 1, b = 4, c = -4 into the discriminant formula D = b^2 - 4ac what do you get when you do so?
Bananas1234
  • Bananas1234
1x^2 + 4x + -4?
Bananas1234
  • Bananas1234
wait sorry wrong formula
Bananas1234
  • Bananas1234
D = 4^2 - 4 times 1 times -4??
jim_thompson5910
  • jim_thompson5910
Yes now evaluate that to get D = ???
Bananas1234
  • Bananas1234
32??
jim_thompson5910
  • jim_thompson5910
is that a perfect square?
Bananas1234
  • Bananas1234
no.....
jim_thompson5910
  • jim_thompson5910
since D = 32 is not a perfect square, that means the original expression cannot be factored. It is considered "prime"
Bananas1234
  • Bananas1234
ohhh i see!!
Bananas1234
  • Bananas1234
Thank you!!!
jim_thompson5910
  • jim_thompson5910
yw

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