Expand:(a+b)2, a2+2ab+b2, a3+3ab+b3, a2+ab+b2, 2a+2b+2ab, which identity is correct, a2-b2=(a+b)(a-b), a2+b2=(a+b)(a-b), a2+b2=(a+b)+(a-b), a2+b2=(a+b)-(a-b), expand using identity (2x-3)2, 4x2+9-12x, 4x2-9+12x, 2x2+9+12x, 2x2-9+12x, (x+4)(x-4), x2-8, x2-16, x2-4, 2x-8, expand using identity(a+3)2, a2+3, a2+9, a2+9+9a, a2+9+6a, simplify (2a+b)(2a-b), 4a2-b2, 2a2-b2, 4a2+b2, a2-2b2.
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Shahinaramshad3
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