maura2mconroy0547 maura2mconroy0547

26-01-2017
Mathematics

contestada

solve the quadratic equation x^2-2x-8=0

I have tried many ways for this one but it ends up being a ridiculous answer.

Respuesta :

PsychrolutesMarcidus PsychrolutesMarcidus

26-01-2017

Using cross multiplication

[tex] x^{2} -2x-8 =0[/tex]
(x-4)(x+2)=0
x-4=0
x+2=0

Thus x=4,-2

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