If $x>0$ and $\sqrt{5x}=\sqrt{3x}+1,$ what is the value of $4x^2?$

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Vincen: Legendary Member; Posts: 2898; Joined: Thu Sep 07, 2017 2:49 pmFollowed by: 5 members; Thanked: 6 times

by Vincen » Wed Sep 30, 2020 6:22 am

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If $x>0$ and $\sqrt{5x}=\sqrt{3x}+1,$ what is the value of $4x^2?$

A. $\dfrac12$

B. $1$

C. $4x-1$

D. $10x-1$

E. $16x-1$

Answer: E

Source: Veritas Prep

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Source: Beat The GMAT — Problem Solving | Wed Sep 30, 2020 6:22 am

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