Mathematics
Senior High
中括弧の中で黄色線のような二乗-二乗ができた時に和と差の積で表すことは何故ダメなのですか??
発
B
" X ² = 11 x ²³y² + y ²4
2
(X²+ - 2 x ²³y² + y² ) - 9 x ²y ²
2
( 1²²_y² ) ² _ 9 x ²³ y ²
{ (x²_y² ) + 3xy } { x² - y² ) − 3 xy}
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