Concept explainers
In Exercises 39—48, use Cramer's Rule (if applicable) to solve each system of equations.
[Hint: For Exercises 47 and 48, let u =
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College Algebra
- In Exercises 83–90, perform the indicated operation or operations. 83. (3x + 4y)? - (3x – 4y) 84. (5x + 2y) - (5x – 2y) 85. (5x – 7)(3x – 2) – (4x – 5)(6x – 1) 86. (3x + 5)(2x - 9) - (7x – 2)(x – 1) 87. (2x + 5)(2r - 5)(4x? + 25) 88. (3x + 4)(3x – 4)(9x² + 16) (2x – 7)5 89. (2x – 7) (5x – 3)6 90. (5x – 3)4arrow_forwardi need part D solutionarrow_forwardFind a and b if a + (5 – 3b) i = ai + 2 (b + 5)arrow_forward
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