For Exercises 15-20, solve the equations and inequalities. (See Example 3) 15. а. (5х — 3х -5) %3D0 b. (5x — 3х - 5) <0 17. a. -r + x + 12 = 0 b. -x +x+ 12 <0 c. -* +x + 12 s0 d. -x + x+ e. - +x+ 12 20 16. a. (3x + 7)(x – 2) = 0 b. (3x + 7)(x – 2) <0 c. (3x + 7)(x – 2) =0 d. (3x + 7)(x – 2)>0 e. (3x + 7)(x - 2) 20 с. (5х — 3х — 5) -0 d. (5x – 3)(x - 5) >0 12 >0 e. (5x – 3)(x – 5) 20 18. a. -x - 10x – 9 = 0 19. a. af + 12a + 36 = 0 20. a. ? - 141 + 49 = 0 b. -x - 10x - 9<0 b. a + 12a + 36 <0 b. f - 14t + 49 <0 c. -x - 10x -9s0 c. a + 12a + 36 s0 c. P- 14t + 49 s0 d. -x - 10x – 9>0 e. -x - 10x – 920 d. a + 12a + 36 >0 d. 2- 14t + 49 >0 e. a + 12a + 36 20 e. f - 14t + 49 20

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A: The given function is defined on (-∞,∞) if its defined at x=3.

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A: Since you have submitted two questions, we'll answer the first question. For the second question…

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A: To find the value of c

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A:

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A: x² + 19x + 19 = 5 So, x² + 19x = 5 - 19 So, x² + 19x = - 14 So, x² + 2•x•(9.5) + (9.5)² = (9.5)² -…

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A:

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A:

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A:

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