Find the product of the complex number and its conjugate.
1 + 2i
1 - 4i
-3
5
1 + 4i

The answer would be 5!

Step-by-step explanation:

You start with 1+2i and the conjugate of this would be 1-2i!

After that, in order to find the product, you multiply (1+2i)(1-2i)

You can use distribution or you can use the formula (a+b)(a-b)=a^2-b^2

Either way the answer will be 1-4i^2

i^2=-1 so you replace the i^2 in our equation with negative 1 and solve to get 5!

Hope this helped! <3

it reflected because of the glass maube

step-by-step explanation:

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it