(a+b)²+(a²-b²)+4(a-b)²
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(a+b)²+(a²-b²)+4(a-b)²(a+b)²+(a²-b²)+4(a-b)²(a+b)²+(a&#
(a+b)²+(a²-b²)+4(a-b)²
(a+b)²+(a²-b²)+4(a-b)²
(a+b)²+(a²-b²)+4(a-b)²
(a+b)²+(a²-b²)+4(a-b)²
=a²+2ab+b²+a²-b²+4a²-8ab+4b²
=6a²-6ab+4b²=2(3a²-3ab+2b²)
6a^2+4b^2-6ab
(a+b)²+(a²-b²)+4(a-b)²
=a^2+2ab+b^2+a^2-b^2+4a^2-8ab+4b^2
=6a^2+4b^2+-6ab