Question

The area of a rectangle is given by the trinomial y^ 2 +4y-45. If the length of the rectangle is y + 9 , what is the width of the rectangle?

Answer 1

Explanation:

Area of rectangle =L×W

Width =Area

`w idth= (area \ )/(length) \\ \\width = \frac{ {y}^(2) + 4y - 45}{y + 9} \\ \\ = ((y - 5)(y + 9))/((y + 9)) \\ \\ width = y - 5`