159E1-S2009

# 159E1-S2009 - MA 15900 1. Express the number in the form...

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MA 15900 EXAM 1 SPRING 2009 1 1. Express the number in the form a b , where a and b are integers. 2 3 ( ) 2 2 1 5 0 + 2 3 1) 5 3 2) 17 3 3) 19 6 4) 20 3 5) 25 6 6) 77 9 7) 109 18 8) 127 18 9) None of the above 2. Factor the polynomial completely. x 5 5 x 3 36 x 1) ( x + 4)( x 9) 2) x ( x + x 9) 3) x ( x + 2)( x 2)( x 2 + 9) 4) ( x + 2) 2 ( x 3) 2 5) ( x 2) 2 ( x + 2 6) x ( x 2 12)( x 2 + 7) x ( x + 2)( x 2)( x + 3)( x 8) x ( x 2 + x + 3)( x 9) x ( x + 2) 2 ( x 2 3. Write the expression in the form a + bi , where a and b are real numbers. i (3 4 i ) 2 1) 24 7 i 2) 24 + 25 i 3) 24 7 i 4) 24 + 25 i 5) 7 + 24 i 6) 25 + 24 i 7) 7 24 i 8) 25 24 i 9) None of the above

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MA 15900 EXAM 1 SPRING 2009 2 4. Express as a polynomial. ( x + 3)( x 3 2)( x 2 + 4) 1) x 6 24 2) x 8 24 3) 4 x 5 8 x 24 4) x 6 + 3 x 5 8 x 24 5) x 6 + 4 x 4 6 x 2 24 6) x 8 + 4 x 4 6 x 2 24 7) x 6 + 3 x 5 + 4 x 4 + 10 x 3 6 x 2 8 x 24 8) x 7 + 3 x 6 + 4 x 4 + 10 x 3 6 x 2 8 x 24 9) None of the above 5. Simplify the expression, and rationalize the denominator when appropriate. 9 x 7 y 5 5 x 8 3 1) y 5 x 45 y 2 3 2) 3 y 2 5 x 45 y 2 3 3) y 5 x xy 3 4) 3 y 2 5 x xy 3 5) y 5 x 45 xy 2 3 6) 3 y 2 5 x 45 xy 2 3 7) y 5 x 225 x 2 y 2 3 8) 3 y 2 5 x 225 x 2 y 2 3 9) None of the above
MA 15900 EXAM 1 SPRING 2009 3 6. Rationalize the denominator . x 4 x + 4 1) x 8 x + 16 x 16 2) x 8 x + 16 x 4 3) x 4 x 16 4) x 4 x 4 5) x 4 x + 16 6) x 4 x + 4 7) x 16 x + 16 8) x 16 x + 4 9) None of the above 7. At 6:30 A.M. a snowplow, traveling at constant speed, begins to clear a highway leading out of

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## 159E1-S2009 - MA 15900 1. Express the number in the form...

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