Mathematics
Senior High
傍線部の途中式を教えてほしいです。どうしてこのような式に変形できるのか分かりません💦
α β の表す複素数平面上の点をそれぞれA
は実数) とおくと
IB-(a+bi) la+bil
⇒(x+yi)-(a+bi)≦la+bil
(x-a)²+(y-b)²≤a²²+b² ... @a
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