anonymous
  • anonymous
.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
1 Attachment
Astrophysics
  • Astrophysics
Factor away
Astrophysics
  • Astrophysics
|dw:1438607790118:dw|

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Astrophysics
  • Astrophysics
|dw:1438607800418:dw| first factor the red part, what do you get?
Astrophysics
  • Astrophysics
So the question you should be asking is how to factor
Astrophysics
  • Astrophysics
So for \[x^2+4x-5\] the way you can do this is, find two number that add up to 4 and multiply to give -5. So what are the two numbers?
anonymous
  • anonymous
im not sure
Astrophysics
  • Astrophysics
-1 and 5, since -1+5 = 4, and -1 x 5 = -5...so we can write it as (x-1)(x+5) now you can try doing the other similarly or you can complete the square/ use quadratic formula \[ x = \frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\] this is the quadratic formula where your express is as such \[ax^2+bx+c\]

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