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3 years ago

Help plsss 20+ pointsss

Mathematics

1 answer:

Lena [83]3 years ago

4 0

Answer:

Step-by-step explanation:

area of square=l*b so

81=3x multiply 3x

81=9x^2

81/9=x^2

9=x^2

$\sqrt9$ =x

3=x

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