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4 years ago

Hey Guys! Im new here and hoping to really get to use this website! Hope you guys could answer my question!

Mathematics

1 answer:

salantis [7]4 years ago

3 0

Answer:

Width =9 cm

Length =6 cm

Step-by-step explanation:

Let x be width, then length is x − 3

Let area be E. Then we have: E = x ⋅ (x −3)

54= x^2-3x

x^2-3x-54=0

We then do the Discriminant of the equation:

D=9+216

D=225

X1=3+15 over 2. which is 9

X2= 3-15. over 2. which is -6 Which is declined, since we can't have negative width and length.

Therefore x is 9. So width

So width = x = 9cm and length is x-3 = 9-3cm=6 cm

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