Express each of the following in a+bi form. a)(13 +4i)+(7 +5i)b)(5 − i)−2(1 − 3i)c)(3− i)(4 +7i)d)(3 − i)(4 +7i) − i(5 − i) − 2(1 − 3i)i

a)

b)

c)

d)

Step-by-step explanation:

a) The sum/difference of two complex numbers is given by:

so:

b) Using the previous property and the distributive property:

c)

Using a process similar to the previous one and taking into account that:

d) Using everything we used in the previous problems:

describing distributions is one of the key skills you’ll need to earn a high score on the ap statistics exam. if you need proof of this, just flip through some past exam questions, which can be found at the collegeboard website. you’ll notice that the first free response question is almost always a question requiring you to look at a graph and describe it.

step-by-step explanation: just trying to get points sorry : (