Radical Equation
Maths and statistics discussion, revision, exam and homework help.
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Re: Radical Equation(Original post by mattalis)
Square the n on the right side and solve accordingly.
n^2 + n = 110
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Re: Radical EquationWhen you square an equation you may generate extra solutions which don't satisfy the original equation.
With this question, when you squared the equation you generated the extra solution n=-11 which can be discounted.Last edited by notnek; 25-07-2012 at 14:50. -
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Re: Radical EquationIt isn't "correct" since the OP gave two solutions and there is only one.(Original post by mattalis)
Oh you never said it was a quadratic equation.. Yeh that's correct that answer
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Re: Radical EquationSolution is 10,(Original post by Lord of the Flies)
It isn't "correct" since the OP gave two solutions and there is only one.
I posted my working including 10 and 11 in the same equation.
I thought it was obvious as to which one is the correct answer therefore I clearly didn't state which one was the correct one.
Sorry for any confusion
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Re: Radical EquationWhy?(Original post by zed963)
I thought it was obvious as to which one is the correct answer therefore I clearly didn't state which one was the correct one.
You cannot do that in an exam -
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Re: Radical EquationAs TenOfThem said, even though your corrector knows 10 is the only solution, you have not made it clear that you know this too. Hence my post.(Original post by zed963)
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