Mathematics
Senior High
Resolved

画像の赤矢印の部分で、どのように変形しているのかわからないので教えていただきたいです!

S • 1 = 3-2 × 1 • 1-3-(11-3 × 3) × 1 1 3 11+3 × 3 = - 1 3x4 11 × 1 -

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