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What's x in ((2x/3)*4)^2-3*(2*1,74)=3?

 May 11, 2016
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Solve for x:
(64 x^2)/9-10.44 = 3

 

(64 x^2)/9-10.44 = (64 x^2)/9-261/25:
(64 x^2)/9-261/25 = 3

 

Add 261/25 to both sides:
(64 x^2)/9 = 336/25

 

Multiply both sides by 9/64:
x^2 = 189/100

 

Take the square root of both sides:
Answer: |  x = (3 sqrt(21))/10          or           x = -(3 sqrt(21))/10

 May 11, 2016

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