3 years ago

Please help thanks will mark brainliest

Mathematics

2 answers:

prisoha [69]3 years ago

4 0

Answer:

l = 12

Step-by-step explanation:

Let l = length

width = l+9

The area of rectangle is

A = lw

A = l * (l+9)

252 = l^2 +9l

Subtract 252 from each side

0 = l^2 +9l -252

Factor

What 2 numbers multiply to -252 and add to 9

21*-12 = 252

21-12 = 9

0 = (l+21) (l-12)

Using the zero product property

l+21=0 l-12=0

l = -21 l = 12

We cannot have a negative length

l = 12

levacccp [35]3 years ago

3 0

Answer:

12 inches

Step-by-step explanation:

W = 9 + L

WL = 252

L = 12

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