4808 pretestans

4808 pretestans - 5 Solve for x if 4 2 3 2 2 2 2 =-x x x x...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Economics 4808 First five problems of pretest answers 1. Factor the expressions: a. 2 + x a 2 a a x b. m m a m a ) 1 ( ) 1 ( + - + ) 1 )( 1 ( m m a - + c. 5 4 - - - LK K ) ( 5 L K K - - 2. Expand and simplify: ( 29 2 3 2 3 4 - - b a b a 3 b 3. Expand: ) 1 2 )( 1 2 ( 2 + - - t t t 1 4 5 2 2 3 - + - t t t 4. Prove: 1 ) / 1 ( ) 1 ( + + = + + x x y x x y x Multiply the RHS by x/x.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 5. Solve for x if ) 4 2 ( 3 ) 2 2 )( 2 ( 2 = + +-+-x x x x First expand to get: ) 12 6 3 4 4 2 2 2 2 =-----+ x x x x x Simplifying gives: 16 8 2 =---x x . Factoring this gives: ) 4 )( 4 ( = + + x x . So x = -4. See S&H chapter one and two....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online