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Andre45 [30]
4 years ago
11

Please help me quickly on this question!

Mathematics
1 answer:
Ksju [112]4 years ago
4 0
A^2 = A
so
a^2 = 100r^2 - 220 r + 121
a^2 = (10r - 11)^2
a = 10r - 11

answer

the side length of the square = 10r - 11
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