(a+b)2 = ?, a2 + 2ab + b2, a2 + b2, a2 - b2, 2a + ab + 2b, a*b = b*a, adevarat, fals, a2 - b2 = ?, (a - b)(a - b), (a + b)(a + b), (a - b)(a + b), x2 - 5x + 6 = 0 , Δ = ?, 4, 2, 1, 0, x2 - 5x + 6 = 0 , x1 = ? , x2 = ?, 2, 0, 3, 4, 2 * (2 + 2) = ?, 1977, 6, 2 cos (2 * pi * f + t), 8

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