Mathematics
Junior High
線で引いたところの計算式を教えて欲しいです!
a²=A, b²=Bx<
すると
=9A2-28AB+16B2
=9A2-24AB+16B2-4AB
=(3A-4B)2-4AB
=(3a2-462)2-4a²b² +A=a², B=b²
=(3a²-4b²)2- (2ab) 2
=(3a²+2ab-4b²)(3a2-2ab-4b2)
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