m² = a² + t²
. (x + 2)² = 8² + (x - 2)²
x² + 4x + 4 = 64 + x² - 4x + 4
x² + 4x + 4 = x² - 4x + 68
x² - x² + 4x + 4x = 68 - 4
8x = 64
x = 64 ÷ 8
x = 8
m = x + 2
= 8 + 2
= 10 cm
-A-
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m² = a² + t²
. (x + 2)² = 8² + (x - 2)²
x² + 4x + 4 = 64 + x² - 4x + 4
x² + 4x + 4 = x² - 4x + 68
x² - x² + 4x + 4x = 68 - 4
8x = 64
x = 64 ÷ 8
x = 8
m = x + 2
= 8 + 2
= 10 cm
-A-