ALGEBRA 728 a b _____ b 1 a 1 _____ _____ ( ab + a2 b2 ) : ((a b)(a + b)) 1 ____ [ a2b2 ] 2 3xy 2x + 3x + 2y 3y 729 __________________ : (9x2 + 4 12x) _______ 2 3x + 2 4x _______ 9x 4 1 ________ 1 ______ 2 _______ 730 (1 4x2 + 2x 4x2 + 2x 1)(1 + 4x2 1) 731 a 2a a _____ _____ ____________ (x a x + a) : x2 + 2ax + a2 732 733 734 735 736 1 ___ [ 2x ] 2 x+a _____ [x a] 1 2a2 _______ a +1 ) ( ) 1 a 1 _____ 1 : (1 a _1_ [a] (x + 2y)2 4xy ____________ : x y 3x2y ) x y ___ 2y + x 1 _____ + ______ ( 6xy2 6xy x y _____ [ 6x2y2 ] 3r3 + 3s3 ___________ 3r2 + 3rs s s r ________ : + _ _____ ( (r s)3 r2 + s2 2rs 2 a 3ab ________ +b ) ( a+b [ 1] r) r a b 2ab : _____ _____ ______ (a + b b a a2 b2) [a b] x x3 x2 + x 1 x x ______ ______ _____________ + _____ (x2 1 x2 + 1) 2 2x _____ [x + 1] 1+x x2 1 _____ 2 x 1 737 _________ 3x 1 2 + ______ 1 x 1 _______ [ (1 + x)2 ] b [2a] a 2a(a2 + 1) _________ a2 1 a+1 1 + ______ ______ 1 a2 + 1 ______ 1 1+a t 741 1 ________ t 1 _____ a + 1 2 + 2a + 1 a______ [ a 1 ] 2 a + 2a + 2 __________ [ a2 + a + 1 ] [1 t t2] _1_ + _1_ p q 742 _____ + 5pq p+q _____ y 1 + __ 1 x 744 ______2 _____ x y y 1 __2 x x 1 _____ [x y] 5 2 t+1 84 2x _____ [x y] 1 __ 1 740 1 + _________ 1 a + _____ pq x+y x 743 _____ + _____2 x y y x __ x _a_ 2 + _b_ b a 738 _________ + a + b _1_ _1_ 739 x 4y _______ [ 9x2 4 ] [1 + 5pq] 1 x 745 ______ __2 1 x __ 1 x(x + 1) _________ [ x2 + x + 1 ] x3 _1_ _x_ x 9 _____ 746 1 3 +x _____ x __ [3] 3x u v 1 _____ u +v 747 ________ u+v 1 + _____ u v 2 2 v(u v) _______ [ u(u + v)] 2 2 x +y x + y ______ 748 ______ 2 y x2 x + __ y + __ x y [x y]