Question

-4(-x+3y-4z) (m-5n-6r)*(-1.4) раскройте скобки

Answer 1

=5.6(-х+3у-4z)*(m-5n-6r)=(-5.6х+16.8у-22.4z)*(m-5n-6r) =-5.6mх+28nх+33.6rх+16.8my-84ny-100.8ry-22.4mz+112nz+134.4rz

Answer 2

To expand the expression, let's apply the distributive property to both sets of parentheses:

1. Expand the first set of parentheses: -4(-x + 3y - 4z) -4 * (-x) + -4 * 3y + -4 * (-4z) 4x - 12y + 16z

2. Expand the second set of parentheses: (m - 5n - 6r) * (-1.4) -1.4m + 1.4 * 5n + 1.4 * 6r -1.4m + 7n + 8.4r

Now, let's multiply the two expanded expressions together:

(4x - 12y + 16z) * (-1.4m + 7n + 8.4r)

To do this, we'll apply the distributive property once again:

-1.4m * 4x + -1.4m * (-12y) + -1.4m * 16z + 7n * 4x + 7n * (-12y) + 7n * 16z + 8.4r * 4x + 8.4r * (-12y) + 8.4r * 16z

Simplify each term:

-5.6mx + 16.8my - 22.4mz + 28nx - 84ny + 112nz + 33.6rx - 100.8ry + 134.4rz

So, the fully expanded expression is:

-5.6mx + 16.8my - 22.4mz + 28nx - 84ny + 112nz + 33.6rx - 100.8ry + 134.4rz