Question

быстрее даю 10 баллов ​

Answer 1

$a(b - 3c) = ab - 3ac \\ k(1 + k) = k + k { }^{2} \\ 5x( - y - z) = - 5xy - 5xz \\ - 1 \times (a - b) = a - b \\ (6 - x)xy = 6xy - x {}^{2} y \\ - 4(x { }^{2} - y {}^{2} ) = - 4x {}^{2} + 4y {}^{2} \\ (y { {}^{} }^{2} - 9x) \times ( - 1) = - y + 9x \\ 2x(5x + 9) = 10x {}^{2} + 18x \\ - 3m {}^{2} (m {}^{2} - 1) = - 3m {}^{4} + 3m {}^{2} \\ - n(n {}^{2} + n {}^{3} ) = - n {}^{3} - n {}^{4}$