a-b=6,ab=5.则(a+b)2=___.
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a-b=6,ab=5.则(a+b)2=___.
a-b=6,ab=5.则(a+b)2=___.
a-b=6,ab=5.则(a+b)2=___.
(a+b)^2
=a^2+b^2+2ab
=a^2+b^2-2ab+4ab
=(a-b)^2+4ab
=6^2+4x5
=36+20
=56
(a+b)2
=a²+b²+2ab
=a²+b²-2ab+4ab
=(a-b)²+4ab
=36+20
=56
(a+b)2
=a²+b²+2ab
=a²+b²-2ab+4ab
=(a-b)²-4ab
=6²-4×5
=36-20
=16
a2-2ab+b2=5,(a+b)2=a2+b2+2ab=a2+b2-2ab+4ab=(a-b)2+4ab=36+20=56
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