а) c^2d^2 - 81x^2 = (cd + 9x)(cd - 9x)б) 4x^4 - 25y^10 = (2x^2 + 5y^5)(2x^2 - 5y^5)
а) (a^2 - 9) / (a + 3) = a - 3б) (a^2 - 4ax + 4x^2) / (a^2 - 4x^2) = (a - 2x)
а) (x - 5)(x + 5) = x^2 - 25б) (3c - 5bd)(3c + 5bd) = 9c^2 - 25b^2d^2
a) (x + 2)(x - 2) - (x + 4)(x - 4) + (x - 5)(x + 5) = x^2 - 4 - (x^2 - 16) + x^2 - 25 = 3x^2 - 29
а) c^2d^2 - 81x^2 = (cd + 9x)(cd - 9x)
б) 4x^4 - 25y^10 = (2x^2 + 5y^5)(2x^2 - 5y^5)
а) (a^2 - 9) / (a + 3) = a - 3
б) (a^2 - 4ax + 4x^2) / (a^2 - 4x^2) = (a - 2x)
а) (x - 5)(x + 5) = x^2 - 25
б) (3c - 5bd)(3c + 5bd) = 9c^2 - 25b^2d^2
a) (x + 2)(x - 2) - (x + 4)(x - 4) + (x - 5)(x + 5) = x^2 - 4 - (x^2 - 16) + x^2 - 25 = 3x^2 - 29