SICP Exercise 1.3 request for comments

Question

I\'m trying to learn scheme via SICP. Exercise 1.3 reads as follow: Define a procedure that takes three numbers as arguments and returns the sum of the squares of the two la

Answer 1

I've had a go:

(define (procedure a b c)
    (let ((y (sort (list a b c) >)) (square (lambda (x) (* x x))))
        (+ (square (first y)) (square(second y)))))