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dellzasaur
 3 years ago
Factor the expression x^4+8x^220??
dellzasaur
 3 years ago
Factor the expression x^4+8x^220??

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dellzasaur
 3 years ago
Best ResponseYou've already chosen the best response.0Were doing some cubic stuff in class lol

dellzasaur
 3 years ago
Best ResponseYou've already chosen the best response.0its x^4+8x^220 @Algebraic!

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.0Start wit a substitution to make it simpler: Let u = x^2, then u^2 = x^4. Now re3place the x's with the u's: u^2 + 8u  20 Can you factor that one?

dellzasaur
 3 years ago
Best ResponseYou've already chosen the best response.0@mathstudent55 Im not sure.... My teacher didnt really go over this so i have no idea. Would I pull out a 4?

Algebraic!
 3 years ago
Best ResponseYou've already chosen the best response.1u^2 + 8u  20 is a quadratic... you've factored a lot of those by now I think....

Algebraic!
 3 years ago
Best ResponseYou've already chosen the best response.1what two number multiply to give 20 and add to give 8?

dellzasaur
 3 years ago
Best ResponseYou've already chosen the best response.0@Algebraic! 10 and 2

Algebraic!
 3 years ago
Best ResponseYou've already chosen the best response.1(u+10)(u2) = (x^2 +10)(x^2 2)

Algebraic!
 3 years ago
Best ResponseYou've already chosen the best response.1(x^22) is a difference of squares.. so you can factor that ...

dellzasaur
 3 years ago
Best ResponseYou've already chosen the best response.0@Algebraic! Okay so what would i do with the other equation?

Algebraic!
 3 years ago
Best ResponseYou've already chosen the best response.1(x^2+10) ? no real roots...
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