Find X values for sqr15x^2 - 5sqr3x + 3sqr5x - 15=0

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.
Nily
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Joined: Sun Mar 15, 2009 11:53 am
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Find X values for sqr15x^2 - 5sqr3x + 3sqr5x - 15=0

would you help me ton solve this equation please??
sqr15x^2-5sqr3x+3sqr5x-15=0

stapel_eliz
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Joined: Mon Dec 08, 2008 4:22 pm
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Nily wrote:sqr15x^2-5sqr3x+3sqr5x-15=0

Your formatting is ambiguous. Do you mean any of the following?

. . . . .a) sqrt[15] x^2 - 5 sqrt[3] x + 3 sqrt[5] x - 15 = 0

. . . . .$\mbox{which means: }\, \sqrt{15} x^2\, -\, 5\sqrt{3}x\, +\, 3\sqrt{5}x\, -\, 15\, =\, 0$

. . . . .b) sqrt[15 x^2] - 5 sqrt[3 x] + 3 sqrt[5 x] - 15 = 0

. . . . .$\mbox{which means: }\, \sqrt{15 x^2}\, -\, 5\sqrt{3x}\, +\, 3\sqrt{5x}\, -\, 15\, =\, 0$

. . . . .c) sqrt[15 x^2] - 5th-rt[3 x] + cbrt[5 x] - 15 = 0

. . . . .$\mbox{which means: }\, \sqrt{15x^2}\, -\, \sqrt[5]{3x}\, +\, \sqrt[3]{5x}\, -\, 15\, =\, 0$

Or something else?

When you reply, please include a clear listing of your steps and reasoning so far, so we can "see" where you are getting stuck. Thank you!