ANSWERS TO YOU TRY EXERCISES 1) a) e 9 157 4 , 9 157 4 f b) e2, 1 2 f c) {8 3i, 8 3i} d) 52 i16, 2 i166 YOU TRY 1 Solve. a) 2k2 3 9k b) 2r2 3r 2 0 c) (n 8)2 9 0 d) y2 4y 10 Putting It All Together Exercises Do the exercises, and check your work. Objective 1: Decide Which Method to Use to Solve a Quadratic Equation Keep in mind the four methods we have learned for solving quadratic equations: factoring, the square root property, completing the square, and the quadratic formula. Solve the equations using one of these methods. 1) z 2 50 0 2) j 2 6j 8 3) a(a 1) 20 4) 2x2 6 3x 5) u2 7u 9 0 6) 3p2p4 0 7) 2k(2k 7) 3(k 1) 8) 2 (w 3)2 8 9) m2 14m 60 0 10) 1 2 y2 3 4 1 2 y 11) 10 (3b 1)2 4 12) c2 8c 25 0 13) 9 2a2 1 6 1 a 14) 100 4d 2 15) r2 4r 3 16) 2t3 108t 30t2 17) p( p 8) 3( p2 2) p 18) h2 h 19) 10 z 1 21 z2 20) 2s(2s 3) 4s 5 21) (3v 4)(v 2) 9 22) 34 6y y2 23) (c 5)2 16 0 24) (2b 1)(b 5) 7 25) 3g g2 26) 5z2 15z 30 0 27) 4m3 9m 28) 1 x2 12 x 3 29) 1 3 q2 5 6 q 4 3 0 30) 3 (12d 5)2 6 R2) Why would you need to complete the square? Why must the coeffi cient be equal to 1 before you complete the square? R1) Which method is easiest to use? Which one is the most diffi cult? www.mhhe.com/messersmith Putting It All Together 635
messersmith_power_intermediate_algebra_1e_ch4_7_10
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