Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
MAT 1175 REVIEW 1. Simplify (use only positive exponents): ( 5 a) 3 x y 2. ) (− 2 x y ) 3 4 Factor completely: b) 5 x 2 − 45 d) x 2 − 3xy − 40 y 2 Perform the indicated operations (write all answers in lowest terms): a 2 − 8a + 15 a 2 − 36 ⋅ a 2 − 7 a + 6 a 2 + 3a − 18 2x + 1 4x + 7 c) − x − 3 4 x − 12 y 2 − 16 y 2 − 7 y + 12 ÷ y2 + 4y y2 − 6y + 9 4 8 d) 2 − 2 x − 25 x − 11x + 30 a) 4. b) Solve: a) 4 5 +3= x 3 b) 5. Divide by long division: 6. a) Simplify: 8. Multiply and Simplify: ( 28 x 6 y 7 )( −8 16 3 + = x + 3 x − 18 x + 6 x − 3 b) Rationalize: b) 10 9. Rationalize: 10. 11. Solve using the quadratic formula: 21 + 11 Solve graphically: ( 5x 24 3+ 2 7. 13. Combine: 2 54 − 3 6 + 4 24 ) 2 Solve and Check: b) 3 x 2 − 8 x + 2 = 0 x + 3y = 6 x− y =2 7 − 10 = 2 x x x 3 − 3x 2 + 4 x − 5 ÷ x − 2 ) a) 3 x 2 − 5 x − 2 = 0 c) 1 − 2 a) 2 5 − 4 2 3 − 1 12. y 0 x −3 c) 5 −8 y x 28 x 10 y 3 b) 7x4 y8 2 2 a) 40 x 3 y 2 + 30 x 3 y 3 − 20 x 2 y 2 c) 3 x 2 − 7 x + 2 3. 8/7/2007 10 x − 4 = 6 c) 20 x 2 − 13 x + 2 = 0 Solve algebraically: 2x + 5 y = 4 3 x − 2 y = −13 Answers 4x 6 y5 1. a) 324 x 24 y 14 b) 2. a) 10 x 2 y 2 (4 x + 3 xy − 2 ) b) 5( x + 3)( x − 3) 3. a) a−5 a −1 b) 4. a) x = −3 5. x 2 − x + 2 y −3 y b) x = −5 c) x5 y5 c) (3x − 1)( x − 2) c) 4x + 3 4( x − 3) c) x = 5 or x = 2 −1 x−2 6. a) 2 x 3 y 3 7 y b) 30x 12 7. 11 6 8. a) 4 15 − 2 5 − 8 3 + 4 9. b) 5 + 2 6 21 − 11 10. x = 4 ⎧ − 1⎫ 11. a) ⎨2, ⎬ ⎩ 3⎭ 12. (3, 1) 13. (− 3, 2) ⎧⎪ 4 + 10 4 − 10 ⎫ , b) ⎨ ⎬ 3 ⎭ ⎪⎩ 3 ⎧2 1⎫ c) ⎨ , ⎬ ⎩5 4⎭ d) (x − 8 y )( x + 5 y ) d) − 4( x − 16) (x + 5)(x − 5)(x − 6)