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9 votes
100 points PLEASE ANSWER
ASAP thank you so much
Show work

100 points PLEASE ANSWER ASAP thank you so much Show work-example-1

2 Answers

9 votes

Answer:

See below

Explanation:

L = length

W = 2 feet less than L = L-2

Area = L x W

20 = L * (L-2)

20 = L^2 - 2L

0 = L^2 - 2L - 20

Use Quadratic Formula a = 1 b = -2 c = -20

L = [-b ± sqrt(b^2-4ac) ]/2a

to calculate L = 5.5826 ft then W = L-2 = 3.5826 ft

User Niranjan Borawake
by
5.5k points
9 votes

Let's Length be x and width be x-2

So

  • Area=20
  • x(x-2)=20
  • x²-2x=20
  • x²-2x-20=0

On solving

  • x=5.6ft

L=5.6

W=5.6-2=3.6ft

User Skaue
by
5.0k points