La regla del trinomio al cuadrado establece que:, 1+5+6, (a + b)^2 = a^2 + 2ab + b^2, (x + 3)^2 =, x^2 + 6x + 9, 4x^2 + 20x + 25, (x - 4)^2 =, x^2 - 8x + 16, x(5), (2x + 5)^2 =, 4x^2 + 20x + 25, x^2 - 8x + 16, 3x - 2)^2 =, x^2 + 2x + 1, 9x^2 - 12x + 4, (x + 1)^2 =, x^2 + 2x + 1, 16x^2 + 24x + 9, (x - 2)^2 =, x^2 - 4x + 4, x^2 + 6x + 9, (4x + 3)^2 =, 16x^2 + 24x + 9, (a + b)^2, (2x - 1)^2 =, x^2 - 4x + 4, 4x^2 - 4x + 1, (x + 6)^2 =, 4x^2 - 4x + 1, x^2 + 12x + 36.

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