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OpenStudy (anonymous):
how to simplify (x^3+25x)
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OpenStudy (tkhunny):
Common Factor in each term. Use your best distributive property.
OpenStudy (anonymous):
actually i typed it wrong it's (x^3+125)
OpenStudy (tkhunny):
Recognize a Sum of Cubes and Factor! (x+5)(You Tell Me)
OpenStudy (anonymous):
(x^2+5x+25)
OpenStudy (tkhunny):
Did you check it? (x+5)(x^2 + 5x + 25) = x^3 + 5x^2 + 25x + 5x^2 + 10x + 125 That's no good. There should be a negative in there, somewhere, or things don't cancel out.
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OpenStudy (tkhunny):
My buddies at PurpleMath have some useful examples. http://www.purplemath.com/modules/specfact2.htm
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