loganswain45 loganswain45

23-05-2016
Mathematics

contestada

what are the zeros of the function f(x)=x^2-2x-15

Respuesta :

23-05-2016

Hello,

f(x)=x²-2x-15=x²-2x+1-16=(x-1)²-16
=(x-1-4)(x-1+4)=(x-5)(x+3)
Zeroes are x=5 or x=-3

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