1) a² + ab + ax + bx = a(a + b) + x(a + b) = (a + x)(a + b)2) x + y - x² - xy = x(1 - x) - y(1 - x) = (1 - x)(x - y)3) 6m - 12 - 2n + mn = 6m - 2n + mn - 12 = 2(3m - n) + mn - 124) 4ab² + 5ab + a = a(4b² + 5) + a = a(4b² + 5 + 1) = a(4b² + 6) = 2a(2b² + 3)
1) a² + ab + ax + bx = a(a + b) + x(a + b) = (a + x)(a + b)
2) x + y - x² - xy = x(1 - x) - y(1 - x) = (1 - x)(x - y)
3) 6m - 12 - 2n + mn = 6m - 2n + mn - 12 = 2(3m - n) + mn - 12
4) 4ab² + 5ab + a = a(4b² + 5) + a = a(4b² + 5 + 1) = a(4b² + 6) = 2a(2b² + 3)