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lornbeachBest ResponseYou've already chosen the best response.0
thats not an answer choice
 one year ago

maym0Re97Best ResponseYou've already chosen the best response.0
What are the choices?
 one year ago

lornbeachBest ResponseYou've already chosen the best response.0
7+7i/2 63+7i/82 7+7i/2 63+7i/82
 one year ago

HeroBest ResponseYou've already chosen the best response.0
\[ \sqrt{49} = \sqrt{49 \dot\ 1} = \sqrt{49} \sqrt{1} = 7i \\(3 + 4i)  (2  5i) = (3  2) + (4i + 5i) = 1 + 9i \]
 one year ago

HeroBest ResponseYou've already chosen the best response.0
I have to agree with @maym0Re97
 one year ago

maym0Re97Best ResponseYou've already chosen the best response.0
Lol that's what I got, but it's not an answer choice
 one year ago

lornbeachBest ResponseYou've already chosen the best response.0
i got that answer as well, but it isnt a choice
 one year ago

HeroBest ResponseYou've already chosen the best response.0
There's probably an equivalent choice
 one year ago

HeroBest ResponseYou've already chosen the best response.0
Multiply top and bottom by 1  9i and see what happens
 one year ago

lornbeachBest ResponseYou've already chosen the best response.0
would it be 63+7i/82?
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
your job is to rewrite in standard form as \(a+bi\) which means do what @hero said
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
\[\frac{7i}{1+9i}\times \frac{19i}{19i}\] the denominator is \(1^2+9^2=82\) all the work is in the numerator
 one year ago
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