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Question Number 118209 by bemath last updated on 16/Oct/20

Answered by MJS_new last updated on 16/Oct/20

$$AB=y$$$$\left(1\right)x^2+y^2={20}^2$$$$\left(2\right){(x-7)}^2+y^2={15}^2$$$$\left(1\right)-\left(2\right)$$$$14x-49=175\Rightarrow x=16$$$$(\Rightarrow y=12)$$

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