A student concluded that the solution of the equation [tex]\sqrt{2x+1}+3 = 0[/tex] is x = 4. The conclusion is true.
What is a perfect square?
Perfect squares are those integers whose square root is an integer.
Let x-a be the closest perfect square less than x,
and let x+b be the closest perfect square more than x, then we get x-a < x < x+b (no perfect square in between x-a and x+b, except possibly x itself).
Then, we get:
[tex]\sqrt{x-a} < \sqrt{x} < \sqrt{x+b}[/tex]
[tex]\sqrt{2x+1}+3 = 0\\\\\sqrt{2x+1}= -3[/tex]
by taking square on both sides we get
[tex](\sqrt{2x+1})^2 = (- 3)^2 \\\\2x+ 1 = 9[/tex]
when x = 4
2(4) + 1
= 9
Thus, the solution of the equation is 4.
Learn more about square root here:
brainly.com/question/7200235
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