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18-07-2016
Mathematics

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Find the x-intercepts of the parabola with vertex (1, -9) and y intercept at (0, -6).

Respuesta :

19-07-2016

Hello,

y=k(x-1)²-9
and -6=k*1-9==>k=3

y=3(x-1)²-9

y=0==>3(x-1)²=9==>(x-1)²=3
==>x=1+√3 or x=1-√3

x-intercepts are (1+√3,0) (1-√3,0)

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