3 years ago

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

1 answer:

3 0

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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