Question

(-7,3+5,4)*(3,9-1,4)​

Answer 1

Ответ: -4,75

Пошаговое объяснение:

Answer 2

To multiply two complex numbers, you can use the distributive property. Given the two complex numbers:

z1 = (-7 + 3i) z2 = (3.9 - 1.4i)

You can multiply them as follows:

z1 * z2 = (-7 + 3i) * (3.9 - 1.4i)

Now, use the distributive property to expand this expression:

z1 * z2 = (-7 * 3.9) + (-7 * -1.4i) + (3i * 3.9) + (3i * -1.4i)

Now, calculate each part separately:

-7 * 3.9 = -27.3 -7 * -1.4i = 9.8i 3i * 3.9 = 11.7i 3i * -1.4i = -4.2i^2 (Remember that i^2 = -1)

Now, substitute these values back into the expression:

z1 * z2 = -27.3 + 9.8i + 11.7i - 4.2i^2

Since i^2 = -1, the expression simplifies further:

z1 * z2 = -27.3 + 9.8i + 11.7i + 4.2

Now, combine like terms:

z1 * z2 = (-27.3 + 4.2) + (9.8i + 11.7i)

z1 * z2 = -23.1 + 21.5i

So, the product of the two complex numbers is:

z1 * z2 = -23.1 + 21.5i