Need help with this exponential equation.

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rogermiranda
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Need help with this exponential equation.

Postby rogermiranda » Sat Jun 12, 2010 2:31 pm

The equation is x(raised to the one-half) - 6x(raised to the negative one-half) - 5 = 0
x^(1/2) - 6x^(-1/2) - 5 = 0
At this point what I tried to do was change it to a square root. So I get this
sqr of x + sqr of 6x - 5 = 0 At this point I am confused and stuck. Please help. By the way the answer is x = 36

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Martingale
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Re: Need help with this exponential equation.

Postby Martingale » Sat Jun 12, 2010 3:47 pm

rogermiranda wrote:The equation is x(raised to the one-half) - 6x(raised to the negative one-half) - 5 = 0
x^(1/2) - 6x^(-1/2) - 5 = 0
At this point what I tried to do was change it to a square root. So I get this
sqr of x + sqr of 6x - 5 = 0 At this point I am confused and stuck. Please help. By the way the answer is x = 36





multiply by

get



let

then you get



now solve for and then determine


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