Mathematics
Senior High
x^2-y^2-x^2+y^2がどのようにして青のように因数分解されたのかを教えてください
この定理は、初学者は具体例で納得する程度で良かろう.
171 x³ - y³ = ((x-y) (x² + xy + y² )
x²+x²y — xy² —yª = (X_Y)(Z³+XY+x}
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3)+x(x8)
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