Answer:
b. [tex] {x}^{2} - 7x - 18[/tex]
Step-by-step explanation:
Area of shaded region
[tex] = (2x + 4)(x - 5) - (x + 2)(x - 1) \\ \\ = 2 {x}^{2} - 10x + 4x - 20 \\ - {x}^{2} + + x - 2x + 2 \\ \\ = {x}^{2} - 7x - 18[/tex]
