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Question-95967




Question Number 95967 by pticantor last updated on 29/May/20
Commented by pticantor last updated on 29/May/20
please i need help please please
$${please}\:{i}\:{need}\:{help}\:{please}\:{please} \\ $$
Answered by john santu last updated on 29/May/20
(1)(√(5−a)) = 4−a^2   5−a = 16−8a^2 +a^4   a^4 −8a^2 +a+11=0  let a = x ⇒x^4 −8x^2 +x+11=0
$$\left(\mathrm{1}\right)\sqrt{\mathrm{5}−{a}}\:=\:\mathrm{4}−{a}^{\mathrm{2}} \\ $$$$\mathrm{5}−{a}\:=\:\mathrm{16}−\mathrm{8}{a}^{\mathrm{2}} +{a}^{\mathrm{4}} \\ $$$${a}^{\mathrm{4}} −\mathrm{8}{a}^{\mathrm{2}} +{a}+\mathrm{11}=\mathrm{0} \\ $$$${let}\:{a}\:=\:{x}\:\Rightarrow{x}^{\mathrm{4}} −\mathrm{8}{x}^{\mathrm{2}} +{x}+\mathrm{11}=\mathrm{0} \\ $$
Commented by pticantor last updated on 29/May/20
thank you !!  please could you help me with  a third question ??
$${thank}\:{you}\:!! \\ $$$$\boldsymbol{{please}}\:\boldsymbol{{could}}\:\boldsymbol{{you}}\:\boldsymbol{{help}}\:\boldsymbol{{me}}\:\boldsymbol{{with}} \\ $$$$\boldsymbol{{a}}\:\boldsymbol{{third}}\:\boldsymbol{{question}}\:?? \\ $$

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