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watermelon26
 3 years ago
Solve
sqrt(x^2 + 4) = 4x
watermelon26
 3 years ago
Solve sqrt(x^2 + 4) = 4x

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RedPrince
 3 years ago
Best ResponseYou've already chosen the best response.1\[\sqrt(x^2+4)=4x\] taking square on both sides \[x^24=16x^2\] \[16x^2x^2=4\] \[15x^2=4\] \[x^2=4/15\] \[x=\pm2/\sqrt(15)\]

pfenn1
 3 years ago
Best ResponseYou've already chosen the best response.0@RedPrince, how did you go from\[x ^{2}+4=16x ^{2}\]to\[x ^{2}4=16x ^{2}\]?

RedPrince
 3 years ago
Best ResponseYou've already chosen the best response.1@pfenn1 by mistake correct it it is now 17 instead of 15 thanks for this
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