Let l and l-6 be the length and width, respectively, of the rectangle. Then:
l(l-6)=40
l²-6l-40=0
(l-10)(l+4)=0
l=10,-4
The rectangle is 10" by 4". ☺☺☺☺
Answer:
1. -2
2. 21^2
Step-by-step explanation:
The answer is B. If you take the even root of a positive number, you'll get two solutions, a positive and a negative
