benjiluvr210 benjiluvr210

23-10-2014
Mathematics

contestada

what are the real zeros for the function
f(x)=x^2-3x-28

Respuesta :

23-10-2014

Factor the equation: (x-7)(x+4) Solve for X: X-7=0 x+4=0 X=7 x=-4 A zero is when the function crosses the x-axis which is solved by setting the function equal to zero.

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konrad509 konrad509

23-10-2014

[tex]x^2-3x-28=0\\ x^2-7x+4x-28=0\\ x(x-7)+4(x-7)=0\\ (x+4)(x-7)=0\\ x=-4 \vee x=7[/tex]

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