² − ²
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𝑎² − 𝑏²
Considere um quadrado de área 𝑎².
Desta área subtrai-se um quadrado menor de área 𝑏².
𝒂² 𝒂
𝒂
𝒂² − 𝒃²
𝒂
𝒂
𝒃²
𝒂 − 𝒃
𝒂 − 𝒃
𝒂² − 𝒃²
𝒂
𝒂
𝒂 − 𝒃
𝒂 − 𝒃
𝒂
𝒂
𝒂 − 𝒃
𝒂 − 𝒃
𝒂 − 𝒃
𝒂 + 𝒃 𝒂
𝒃
𝒃
𝟔𝟒𝒄𝒎²
𝒙²
𝟔𝟒𝒄𝒎²𝒙².
𝟔𝟒 − 𝒙²
𝟔𝟒 − 𝒙²
𝑸𝒖𝒊𝒏𝒕𝒂𝒍
𝑪𝒂𝒔𝒂
𝟐𝟎𝒎
𝟐𝟓𝟔𝒎²
𝒙
𝟖𝒃
𝟏𝟑𝒂
𝒂)
𝟓𝒚²
𝟏𝟎𝒙
𝒃)
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