gulla123 gulla123
  • 23-10-2017
  • Mathematics
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Find the axis of symmetry for this parabola : y= 2(x-7)(x+9)

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wolf1728
wolf1728 wolf1728
  • 23-10-2017
y = 2(x-7)(x+9)
y = 2x - 14x (x +9)
y = 2x^2 +18x -14x^2 + 126x
y = -12x^2 +144x
axis of symmetry = -b / 2a
= -144 / 2*-12
= 6
axis of symmetry x = 6





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