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The given gure shows a rectangle inscribed in an isosceles n'ght tn'angle whose hypotenuse is 42 units long. [3] Express the ycoordinate of P in terms of x. (Hint: Write an equation for the line AB.) [[1] Express The area of the rectangle in tem of x. [c] What is the largest area the rectangle can have, and what are its dimensions? [a] The expression for the ycoordinate of P is E. (Type an expression using x as the variable} PIX, ?} 21