Question

помогите) аоооаоааоаоаоааоаооаа 2 задание

Answer 1

$- 3(4 + 5m - 6n) = \\ - 3 \times 4 - 3 \times 5m - 3 \times ( - 6n) = \\ - 12 + 15m + 18n$

$- 0.2( - 14t + z - 25y) = \\ - 0.2 \times ( - 14t) - 0.2z - 0. 2\times ( - 25y) = \\ 2.8t - 0.2z + 5y$

$( - 3.1x + 7.8y - 9.6) \times 0.1 = \\ 0.1 \times ( - 3.1x) + 0.1 \times 7.8y + 0.1 \times ( - 9.6) = \\ - 0.31x + 0.78y - 0.96$

$(0.7x - 0.6y + 0.5z) \times ( - 1.5p) = \\ - 1.5p \times 0.7x - 1.5p \times ( - 0.6y) \\ - 1.5p \times 0.5z = \\ - 1.05px + 0.9py - 0.75pz$

$- (a - b) - b = - a + b - b = - a$

$- c + (c - d) = - c +c - d = - d$

$- (2.7 - a) + ( - a + 1.8) = \\ - 2.7 + a - a +1 .8 = \\ - 2.7 + 1.8 = - 0.9$

$- ( - 6.2 + a + b) - (a - b + 10.9) = \\ 6.2 - a - b - a + b - 10.9 = \\ - 2a - 4.7$