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Question Number 150189 by mathdanisur last updated on 10/Aug/21

Solve the equation:  (x - 3) (√(x^2  - x − 2)) = 0

$$\mathrm{Solve}\:\mathrm{the}\:\mathrm{equation}: \\ $$$$\left(\mathrm{x}\:-\:\mathrm{3}\right)\:\sqrt{\mathrm{x}^{\mathrm{2}} \:-\:\mathrm{x}\:−\:\mathrm{2}}\:=\:\mathrm{0} \\ $$

Commented by Skabetix last updated on 10/Aug/21

x=3 or x=2 or x=−1

$${x}=\mathrm{3}\:{or}\:{x}=\mathrm{2}\:{or}\:{x}=−\mathrm{1} \\ $$

Answered by Rasheed.Sindhi last updated on 10/Aug/21

(x - 3) (√(x^2  - x − 2)) = 0  x−3=0 ∨ (√(x^2  - x − 2))=0  x=3 ∨ (x−2)(x+1)=0  x=3 ∨ x=2 ∨x=−1

$$\left(\mathrm{x}\:-\:\mathrm{3}\right)\:\sqrt{\mathrm{x}^{\mathrm{2}} \:-\:\mathrm{x}\:−\:\mathrm{2}}\:=\:\mathrm{0} \\ $$$$\mathrm{x}−\mathrm{3}=\mathrm{0}\:\vee\:\sqrt{\mathrm{x}^{\mathrm{2}} \:-\:\mathrm{x}\:−\:\mathrm{2}}=\mathrm{0} \\ $$$$\mathrm{x}=\mathrm{3}\:\vee\:\left(\mathrm{x}−\mathrm{2}\right)\left(\mathrm{x}+\mathrm{1}\right)=\mathrm{0} \\ $$$$\mathrm{x}=\mathrm{3}\:\vee\:\mathrm{x}=\mathrm{2}\:\vee\mathrm{x}=−\mathrm{1} \\ $$

Commented by mathdanisur last updated on 10/Aug/21

Thankyou Ser

$$\mathrm{Thankyou}\:\mathrm{Ser} \\ $$

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