Question

Раскройте скобки: 1) 2(a+3b-7c); 2) 0,4( 1,3x - 0,5y - 1,3); 3) (a - 4d + 3p) * (-0,8);

Answer 1

Ответ:

$1)2a+6b-14c;\ 2)0,52x-0,2y-0,52;\ 3)-0,8a+3,2d-2,4p.$

Пошаговое объяснение:

$1)2(a+3b-7c)=2a+6b-14c\\2)0,4(1,3x-0,5y-1,3)=0,52x-0,2y-0,52\\3)(-0,8)(a-4d+3p)=-0,8a+3,2d-2,4p$

Answer 2

Sure, let's simplify the expressions by expanding the brackets:

1. 2(a + 3b - 7c) = 2 * a + 2 * 3b - 2 * 7c = 2a + 6b - 14c

2. 0.4(1.3x - 0.5y - 1.3) = 0.4 * 1.3x - 0.4 * 0.5y - 0.4 * 1.3 = 0.52x - 0.2y - 0.52

3. (a - 4d + 3p) * (-0.8) = -0.8a + 0.8 * 4d - 0.8 * 3p = -0.8a + 3.2d - 2.4p

So the simplified expressions are:

1. 2a + 6b - 14c
2. 0.52x - 0.2y - 0.52
3. -0.8a + 3.2d - 2.4p