emerymontruep7prkv
emerymontruep7prkv emerymontruep7prkv
  • 17-07-2018
  • Mathematics
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Find the length of DA.

Find the length of DA class=

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razorsharptip
razorsharptip razorsharptip
  • 17-07-2018

This is a power of a point problem.


So we have DA*DB = DY*DZ


or 3x*(3x+8) = x*(32+x)


9x^2 + 24x = 32x + x^2


8x^2 -8x = 0

(we can eliminate 0 as an option)


8x - 8 = 0

8x = 8


x = 1


DA = 3*1

DA = 3


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