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## Main Question or Discussion Point

Y^6+124Y^3-125

the ^ means to the power of

asks to factor

help

the ^ means to the power of

asks to factor

help

- Thread starter AshyLarry
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Y^6+124Y^3-125

the ^ means to the power of

asks to factor

help

the ^ means to the power of

asks to factor

help

Hurkyl

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I tried the u^2=y^6 and u=y^3, but im still having issues

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Remember, If r is a root of the equation F(x), then x-r is a factor.

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(y^3 + 125) * (y^3 - 1)

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you can factor y^3 +125.....anyone know how to do that?

Last edited:

Fermat

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you could use your calculator to take the cube root of -125

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y^3 + 125= (y + 5)(y^2 - 5y + 25)

If you want proof:

a^3 + b^3

a^3 + b^3 + 3a^2b + 3ab^2 - 3a^2b - 3ab^2

(a+b)^3 - 3a^2b - 3ab^2

(a+b)^3 - 3ab(a+b)

(a+b)((a+b)^2 - 3ab)

(a+b)(a^2 + b^2 - ab)

If you want proof:

a^3 + b^3

a^3 + b^3 + 3a^2b + 3ab^2 - 3a^2b - 3ab^2

(a+b)^3 - 3a^2b - 3ab^2

(a+b)^3 - 3ab(a+b)

(a+b)((a+b)^2 - 3ab)

(a+b)(a^2 + b^2 - ab)

Last edited:

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when did this become college algerbra?

Math Is Hard

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algerbra? :rofl: sorry -I had a teacher back in Alabama who pronounced it that way.Tom McCurdy said:when did this become college algerbra?

HallsofIvy

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I had a teacher in Boston who talked about "gammers" and "alphers".

matt grime

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my thoughts exactlyTom McCurdy said:when did this become college algerbra?

Math Is Hard

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:rofl: :rofl: :rofl:HallsofIvy said:I had a teacher in Boston who talked about "gammers" and "alphers".

selfAdjoint

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And then there was Alpher, Bethe, and Gamow.

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I don't see what is so funny...

TD

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It's about how mathematicians should get at least 1 hour of Greek philology in their studies

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What is the point if they understand the concepts and teach them to their students?

TD

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matt grime

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HallsofIvy

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However, when I was in college, a delivery area behind the cafeteria had been clearly lettered "No Pahking"!

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...and this was in Boston?

HallsofIvy

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And I hearby swear to act like a "mentor" and not contribute anymore nonsense to this thread!

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I do believe it is now College Algebra. They work their way up from linear functions, to quadratics, to cubics, and all while doing them on the calculator. However, why they're at cubics now, I'm not sure. They should probably still be on linear or starting on quadratic.Tom McCurdy said:when did this become college algerbra?

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