# What is the solution of 5 2i

## Applying Mathematics HAK 2, Solutions

33 4 Quadratic Equations and Quadratic Functions 4.1 Quadratic Equations 374 a. yes d. yes b. no, because 8 is not a solution e. yes c. no, because both 4 and 7 are not a solution for no, because - 4.8 is not a solution 375 I. a. D b. C II. A. C b. A 376 a. {‒12, 4} b. {2, 12} c. {- 4, 7} d. {‒12, - 5} e. {‒7, 6} f. {- 4, 5} 378 a. {- 6, 2} b. {- 9, 3} c. {1, 7} d. {2, 14} e. {‒7, - 4} f. {- 6, 7} 379 a. {- 3, 5} b. {- 2, ‒7} c. {4, 9} d. {- 2.68, 0.93} e. {} Reason: 2 x - 13 _ 14 3 2 = - 83 _ 196. Since there is no real number whose square is a negative number, this equation has no real solution. f. {‒1.95, 1.11} 381 a. {0} c. {- 2 _ 3, 2 _ 3} e. {- 1 _ 2, 1 _ 2} g. {‒100, 100} b. {- 2, 2} d. {} f. {} h. {} 382 a. {0, - 2} c. {0, 3_ 2} e. {0, 1_ 8} g. {0, 10 ‒3} b. {0, 1 _ 2} d. {0, ‒1} f. {0, 36} h. {0, ‒10 ‒4} 383 a. {‒1.53, - 0.22} c. {2.08, 8.04} e. {- 2.32, 0.01} b. {‒1.56, 0.06} d. {‒1.29, 0.12} f. {3.51, 10.49} 384 a. {‒1.14, - 0.23} b. {- 2.6, 6.08} c. {- 45, - 2} d. {‒17.09, - 0.11} 385 a. {- 5, 5} b. {1, 6} c. {8_ 7, 8_ 5} d. {‒1.24, 3.24} e. {- 0.3, 0.08} f. {1.13, 2.18} 386 x 1, 2 = - p _ 2 ± 9 ___ p 2 _ 4 - q = - b _ a _ 2 ± 9 ____ 2 b _ a 3 2 _ 4 - c _ a = - b _ 2a ± 9 ____ b 2 _ 4 a 2 - c _ a = - b _ 2a ± 9 ____ b 2 - 4ac __ 4a 2 = ‒b ± 9 _____ b 2 - 4ac __ 2a 387 a. C b. B 388 a. {- 5.702, - 0.548} c. {‒1,843, 1,947} e. {} b. {- 0.184, 0.695} d. {- 0.237, 5.819} f. {- 3.212, - 0.066} 389 {- 0.67, 1.06} 391 a. two solutions c. no solution e. two solutions g. two solutions b. two solutions d. no solution for two solutions h. no solution 392 With D we denote the discriminant of the given equation. a. two solutions, since D> 0 d. a solution since D = 0 g. two solutions since D> 0 b. two solutions, since D> 0 e. no solution because D <0 h. no solution because D <0 c. two solutions, since D> 0 f. no solution, since D <0 i. two solutions, since D> 0 393 a. two solutions c. two solutions e. no solution b. two solutions d. no solution for two solutions ggb / tns z39vk7 ggb / tns rj227q

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