Question

(-4,5)×2/3;(-3,5)×4/7;(2,25)×(-8);5×(-2,1)×2​

Answer 1

Ответ:

1) 3; 2)-2 3)-18 4)-21

Пошаговое объяснение:

-4,5*2=-9  -9/3=-3     -3.5*4=-14  -14/7=-2      2.25*(-8)=-18    5*2=10   10*(-2.1)=-21

Answer 2

To simplify these expressions, let's perform the calculations step by step:

1. (-4, 5) × 2/3: To multiply a complex number by a scalar, we multiply both the real and imaginary parts by that scalar. Therefore, we have: Real part: -4 × 2/3 = -8/3 Imaginary part: 5 × 2/3 = 10/3

So (-4, 5) × 2/3 is equal to (-8/3, 10/3).

2. (-3, 5) × 4/7: Using the same logic as above: Real part: -3 × 4/7 = -12/7 Imaginary part: 5 × 4/7 = 20/7

Therefore, (-3, 5) × 4/7 is equal to (-12/7, 20/7).

3. (2, 25) × (-8): To multiply two complex numbers, we distribute the multiplication between the real and imaginary parts. Therefore: Real part: 2 × (-8) = -16 Imaginary part: 25 × (-8) = -200

So (2, 25) × (-8) is equal to (-16, -200).

4. 5 × (-2, 1) × 2: First, let's multiply (-2, 1) by 2: Real part: -2 × 2 = -4 Imaginary part: 1 × 2 = 2

Now, let's multiply the result by 5: Real part: -4 × 5 = -20 Imaginary part: 2 × 5 = 10

Thus, 5 × (-2, 1) × 2 is equal to (-20, 10).

Therefore, the simplified expressions are:

1. (-4, 5) × 2/3 = (-8/3, 10/3)
2. (-3, 5) × 4/7 = (-12/7, 20/7)
3. (2, 25) × (-8) = (-16, -200)
4. 5 × (-2, 1) × 2 = (-20, 10)