Mathematics
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上の計算式からどうやって下の式に計算したんですか。

\2 π × ( ²a + 4b ) ² × 1²/2² - ₁ × ( ²0 ) ² × 1²/12 2a\2 X X 2 2 1/(a+26²_a²

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✨ Best Answer ✨

●2つある分数部分を「2」で約分

=π×(a+2b)²×(1/2)-π×(a)²×(1/2)

=(1/2)π(a+2b)²-(1/2)πa²

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