Confuzzled54
Confuzzled54 Confuzzled54
  • 03-05-2017
  • Mathematics
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What is the axis of symmetry of the function of -(x+9)(x-21)

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apologiabiology
apologiabiology apologiabiology
  • 03-05-2017
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-x^2+12x+189

now
the axis of symmetry is -b/2a for ax^2+bx+c

so

-1x^2+12x+189
a=-1
b=12

-b/2a=-12/(2*-1)=-12/-2=6
the axis of summetry is x=6
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