monemone123
monemone123
05-06-2018
Mathematics
contestada
How do you solve
2x2-10x-28=0
Respuesta :
gmany
gmany
05-06-2018
[tex]2x^2-10x-28=0\ \ \ |:2\\\\x^2-5x-14=0\\\\x^2+2x-7x-14=0\\\\x(x+2)-7(x+2)=0\\\\(x+2)(x-7)=0\iff x+2=0\ \vee\ x-7=0\\\\\boxed{x=-2\ \vee\ x=7}[/tex]
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