Extending square garden

Mrs. Petrová's garden had the shape of a square with a side length of 15 m. After its enlargement by 64 m2 (square), it had the shape of a square again. How many meters has the length of each side of the garden been extended?

Correct answer:

x =  2 m

Step-by-step explanation:

a=15 m S2=64 m2  a2+S2=b2  b=a2+S2=152+64=17 m  x=ba=1715=2 m



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