scientific notation
(2.6 x 104)( 7.3 x 108)
1.898 x 1013
3ab-b+a2
-31
A n B
(15,40)
(4 -1) (3 -2)
+2
(-11 9) (10 9)
(10 -5)
(9 27)
(6.8 x 109 )( 4.5 x 106)
3.06 x 1016
b2-(-a)
28
A U B
(15,19,23,26,34,40,71,83,100)
(3 -6) (5 -1)
x
(-1 4) (3 2)
(-3 -15)
(7 9)
2(a-4b)-a2b2
-179
B
(2,5,7,19,23,34)
(2 -2 1) (-4 2)
x (-2 1)
(-4 3 0) (3 4)
(-1 6)
(10 -5)
ab+a2-2b2
-56
A U (B n C)
(15,19,23,34,40,100)
4(a-b)2
--------------
(a+b)3
-32