Answer:
Step-by-step explanation:
1. x is the width and length is x+5.
2. x(x+5) = 126
3. x^2 + 5x = 126
4. subtract 126 from each side to set to zero
5. x^2 + 5x - 126 = 0
6. factor
7. (x+14)(x-9)=0
8. x can equal -14 or 9 but -14 doesn't make sense in this problem because a length can't be negative
9. so width is 9 and length is 14
