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12-12-2016
Mathematics

Answered

Given the equation Square root of 2x plus 1 = 3, solve for x and identify if it is an extraneous solution.

^ I really don't understand this topic, whatsoever. Could someone help?

Verified Answer :

JcAlmighty JcAlmighty

13-12-2016

The answer is 4.

Square root of 2x plus 1 = 3:
\(\sqrt{2x+1} =3\)

Square both sides:
\(( \sqrt{2x+1} )^{2} =3^{2} \\ \\ 2x+1=9 \\ 2x = 9 - 1 \\ 2x =8 \\ x = 8:2 \\ x =4\)

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