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Answers
Answer:
Explanation:
The given rectangle has a length that is 10 units longer than its width. This can be expressed in the following equation, where l is the length and w is the width of the rectangle.
l=w+10
Since the area of the rectangle is equal to its length multiplied by its width (A=l∗w), and the area of the rectangle is given, the following equation must be true.
75=l∗w
Replacing l in this equation with its value stated in the first equation results in the following.
75=(w+10)∗w
Distribute the variable into the parentheses.
75=w2+10w
w2+10w−75=0
Factor the polynomial.
(w−5)(w+15)=0
5 and −15 are both solutions for this equation, but −15 is not valid as a width for a rectangle. The width of the rectangle is 5 units, which is the shorter side since the length is 10 units longer (l=w+10).