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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?
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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?

User Brampage
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1 Answer

3 votes
The answer is 4.

Square root of 2x plus 1 = 3:

√(2x+1) =3

Square both sides:

( √(2x+1) )^(2) =3^(2) \\ \\ 2x+1=9 \\ 2x = 9 - 1 \\ 2x =8 \\ x = 8:2 \\ x =4

User Matan Sanbira
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