Mathematics
Senior High

まるで囲った部分がなんで-になるのかわかんないです
教えてください( . .)"

次の式を計算せよ。 (1) (1+√2-√3)(1-√2+√3) 1 (2) 1 1 + + √√√3+√√22+√3 √√5+2 (1) (1+√2√3) (1-√√√√3) {1+(√2−√3)}{1-(√23)} = = 12-(√2−√√3)²=1-(2-2√√6+3)

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