Question

-2(3,1x-1)+3(1,2x+1)-8(0,3x+3) приx=0,8

Answer 1

Продолжаю решение
-6,2х+2+3,6х+3-2,4х-24 (после раскрытия скобок)
-5х-19 (после вычисления)
-5*0,8-19=-23

Answer 2

To evaluate the expression, plug in the value of x, which is 0.8, into each term and then perform the calculations:

1. For the term -2(3, 1x - 1):

   x = 0.8 -2(3, 1 * 0.8 - 1) = -2(3, 0.8 - 1) = -2(3, -0.2)

2. For the term 3(1, 2x + 1):

   x = 0.8 3(1, 2 * 0.8 + 1) = 3(1, 1.6 + 1) = 3(1, 2.6)

3. For the term -8(0, 3x + 3):

   x = 0.8 -8(0, 3 * 0.8 + 3) = -8(0, 2.4 + 3) = -8(0, 5.4)

Now, let's compute each term:

1. -2(3, -0.2) = (2 * 3, -2 * 0.2) = (6, -0.4)
2. 3(1, 2.6) = (3 * 1, 3 * 2.6) = (3, 7.8)
3. -8(0, 5.4) = (8 * 0, -8 * 5.4) = (0, -43.2)

Finally, add up the results from each term:

(6, -0.4) + (3, 7.8) + (0, -43.2) = (6 + 3 + 0, -0.4 + 7.8 - 43.2) = (9, -35.8)

So, the final result of the expression -2(3, 1x - 1) + 3(1, 2x + 1) - 8(0, 3x + 3) when x = 0.8 is (9, -35.8).