#1
Can the smart ppl of ug help me with my hmwk?

solve the inequality

(x^2 - 5)/x > 2

answer in exact form.

EDIT: typed the qns wrongly!

the ans is: 1 - squareroot 6 < x < 0 OR x > 1 + squareroot 6


Last edited by nawawa at Jan 14, 2007,
#2
(x^2 - 5) > 2*2

(x^2 - 5) > 4

x^2 - 5 > 4

X^ 2 > 4 + 5

x^2 > 9

x > Route 9

x > 3


I haven't done inequalities in fair while, so please excuse me if it's wrong
Co-President of UG's Tubgirl Virgins Club

#3
Quote by JamieB
(x^2 - 5) > 2*2

(x^2 - 5) > 4

x^2 - 5 > 4

X^ 2 > 4 + 5

x^2 > 9

x > Route 9

x > 3


I haven't done inequalities in fair while, so please excuse me if it's wrong


you can't do X^2 > 9

x > route 9

you have to bring it to one side

X^2 - 9 > 0

parentheses
(x-3)(x+3) > 0

draw a parabola arms upwards cutting the x axis at -3 and 3 then show for which arguments the parabola is positive which will get you

x is an element of (-infiniti, -3) u (3, infiniti)

yo.
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#4
because its a square, it has two answers. it can be plus or minus 3.
=deportivo=


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#7
it's the holidays
i forget everything and have to re-learn it again
bah
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