gistfile1.txt

; your code goes here

(define (square x) (* x x))
(define (sum-of-square x y) (+ (square x) (square y)))

(define (q13 x y z) (cond 
	((and (>= y x) (>= z x)) (sum-of-square y z))
	((and (>= x y) (>= z y)) (sum-of-square x z))
	(else (sum-of-square x y))
))

(q13 1 2 3)

(define (sqrt x) (* x x))

(define (average x y)
	(/ (+ x y) 2))

(define (improve guess x)
	(average guess (/ x guess )))
	
(define (good-enough? guess x)
	(< (abs (- (square guess) x)) 0.001))
	
(define (sqrt-iter guess x)
	(if (good-enough? guess x)
		guess
		(sqrt-iter (improve guess x) x)))