In Exercises 17–26, let
Solve each matrix equation for X.
X-B=A
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College Algebra (7th Edition)
- In Exercises 15–20, simplify each expression. 15. 24 - 36 ÷ 4.3 16. (52 – 24) + [9 ÷ (-3)] (8 – 10) - (-4)² 17. - (-4) 2 + 8(2) ÷ 4 18. 7x – 4(3x + 2) – 10 19. 5(2у — 6) - (4у — 3) 20. 9х — [10 — 4(2х — 3)1arrow_forwardFor Exercises 1–2, simplify the expression. 8! 1. 3! · 5! (2n + 1)! 2. (2n – 3)!arrow_forwardFor Exercises 27–30, simplify the powers of i. (See Example 2) 27. а. 20 b. 29 28. а. 32 b. 47 с. 50 29. а. 37 d. i 41 b. i3 c. 66 -37 30. а. i103 d. 27 b. i c. 82 -103 d. i 82 с. 52 d. i 52arrow_forward
- Find A. 5 -2 (4)–1 -4 2 A = IIarrow_forwardIs 1 raised to the power of 2 + 2 raised to the power of 2 equal to 3 raised to the power of 2?arrow_forwardFind [4x³ (In x)² dx. O A. 1.4 X x In²x + In x + O B. x² ln² x - ln x + O C. x ln x O D. x ln x X 2 4 x² 2 2 X 4 2 ln x + - ln x + 1.4 8 x4 8 4 x² 2 x4 8 + C + C + C + Carrow_forward
- Please simplify completely. In #1–4, list the necessary restrictions on the variable; if none, write “none”.arrow_forwardIn Exercises 65–74, factor by grouping to obtain the difference of two squares. 6x + 9 – y? 12x + 36 – y? 65. x? 66. x2 67. x + 20xr + 100 68. x? + 16x + 64 – x4 69. 9x2 70. 25x? – 20x + 4 – 81y? 30x + 25 – 36y? 71. x* - x? – 2x – 1 72. x4 -х2 — бх — 9 x? + 4xy – 4y2 x²+ 10xy - 25y2 73. z? 74. z? - rarrow_forwardIn Exercises 20–23, determine whether each statement is true or false. V3 V3 20. - 5 5 21. (x|x is a negative integer greater than -4} = {-4, –3, –2, –1} 22. -17 ¢ {x|x is a rational number} 23. -128 + (2·4) > (-128 ÷ 2) · 4arrow_forward
- For Exercises 7–18, write each expression in terms of i and simplify. (See Example 1) 7. V-121 8. V-100 9. V-98 10. V-63 11. V-4V-9 12. V-IV-36 13. V-10V=5 14. V-6V-15 V-98 15. V-2 V-45 16. V-5 V-63 17. V-80 18. V5 Vīarrow_forwardEvaluatearrow_forward2. Find the difference quotient of Ax) = 4x² – 7x+5 %3Darrow_forward
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