pomocy z maty zad w załączniku
(8 + x)² - x² = 16²
64 + 16x + x² - x² = 256
16x = 256 - 64 = 192
x = 192/16 = 12
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(8 + x)² - x² = 16²
64 + 16x + x² - x² = 256
16x = 256 - 64 = 192
x = 192/16 = 12