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Ivanshal [37]
3 years ago
8

Solve and check for extraneous solutions.

" title=" \sqrt{3x+1} =x-1" alt=" \sqrt{3x+1} =x-1" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
drek231 [11]3 years ago
7 0
D:3x+1\geq 0\wedge x-1\geq 0\\
D:3x\geq-1 \wedge x\geq1\\
D:x\geq-\frac{1}{3} \wedge x\geq1\\
D:x\geq1\\
\sqrt{3x+1}=x-1\\
3x+1=(x-1)^2\\
3x+1=x^2-2x+1\\
x^2-5x=0\\
x(x-5)=0\\
x=0 \vee x=5


The solution is 5.
The extraneous solution is 0.
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