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anonymous
 one year ago
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anonymous
 one year ago
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Astrophysics
 one year ago
Best ResponseYou've already chosen the best response.0dw:1438607790118:dw

Astrophysics
 one year ago
Best ResponseYou've already chosen the best response.0dw:1438607800418:dw first factor the red part, what do you get?

Astrophysics
 one year ago
Best ResponseYou've already chosen the best response.0So the question you should be asking is how to factor

Astrophysics
 one year ago
Best ResponseYou've already chosen the best response.0So for \[x^2+4x5\] 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?

Astrophysics
 one year ago
Best ResponseYou've already chosen the best response.01 and 5, since 1+5 = 4, and 1 x 5 = 5...so we can write it as (x1)(x+5) now you can try doing the other similarly or you can complete the square/ use quadratic formula \[ x = \frac{ b \pm \sqrt{b^24ac} }{ 2a }\] this is the quadratic formula where your express is as such \[ax^2+bx+c\]
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