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Let α,β be the roots of x^2+112x+1, let γ,δ be the roots of x^2+139x+1. What is the value of
(α−γ)(α−δ)(β−γ)(β−δ)?
 one year ago
 one year ago
Let α,β be the roots of x^2+112x+1, let γ,δ be the roots of x^2+139x+1. What is the value of (α−γ)(α−δ)(β−γ)(β−δ)?
 one year ago
 one year ago

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LiothiqueBest ResponseYou've already chosen the best response.0
There must be a "trick" I don't see . The roots are too complicated to calculate/simplify manually. For example, delta is \[ \frac{1}{2} \left(139+\sqrt{19317}\right) \]
 one year ago

mukushlaBest ResponseYou've already chosen the best response.1
\[(α−γ)(α−δ)(β−γ)(β−δ)=(α^2(γ+δ)α+γδ) \ (β^2(γ+δ)β+γδ)\] put the values of \(γ+δ\) and \(γδ\) then simplify
 one year ago

hartnnBest ResponseYou've already chosen the best response.0
\(\alpha^2+112\alpha+1=0\) \(\beta^2+112\beta+1=0\) \(\alpha\beta=1,\alpha+\beta=112\) \(\gamma^2+139\gamma+1=0\) \(\delta^2+139\delta+1=0\) \(\gamma+\beta=139,\gamma\beta=1\) \((\alpha\gamma)(\alpha\delta)=(\alpha^2(\gamma+\delta)\alpha+\gamma\delta)\) does this lead u to somewhere ?
 one year ago

mukushlaBest ResponseYou've already chosen the best response.1
\[(α−γ)(α−δ)(β−γ)(β−δ)=(α^2(γ+δ)α+γδ) \ (β^2(γ+δ)β+γδ)\]\[=(α^2+139α+1) \ (β^2+139β+1)\]
 one year ago
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