Question 1139518
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Given: PQ = p.<br>
Let PA = x.<br>
Then QA = p-x.<br>
{{{PQ*QA = (PA)^2}}}
{{{p(p-x) = x^2}}}<br>
This is a quadratic equation with variables instead of constants for coefficients.  Use the quadratic formula to get an expression for the length of PA in terms of p.