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X-2-9x-1+14=0

Question

X-2-9x-1+14=0

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Step 1

Let z=x^-1

We replace x^-2 by z^2 and x^-1 by z.

x2-9x-14-0
Or, z2-9z+14-0
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x2-9x-14-0 Or, z2-9z+14-0

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Step 2

Then we factor a...

z2-9z+14-0
Or, z2-7z-2z+14=0
Or, z(z-7)-2(z-7)=0
Or, (z-7)(z-2) 0
Or, z=7 or, 2
help_outline

Image Transcriptionclose

z2-9z+14-0 Or, z2-7z-2z+14=0 Or, z(z-7)-2(z-7)=0 Or, (z-7)(z-2) 0 Or, z=7 or, 2

fullscreen

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Trigonometry

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