Giving medals to someone who can help.
Complete by applying polynomial identities to complex numbers.
(X+(3+5i))^2

Question

Giving medals to someone who can help. 
Complete by applying polynomial identities to complex numbers.
(X+(3+5i))^2

freckles · Answer

you are suppose to multiply correct?

anonymous · Answer

Yes

freckles · Answer

$$(a+b)^2=a^2+2ab+b^2$$

anonymous · Answer

I am not sure if that is the formula.. only because it says nothing about it in my lesson

freckles · Answer

$$(a+b)^2=(a+b)(a+b) =aa+ab+ab+bb \ =a^2+ab+ab+b^2 \ =a^2+2ab+b^2$$

anonymous · Answer

I am just not sure if that is the formula I should use because it is not in my lesson

anonymous · Answer

And my teacher wants to see my work

freckles · Answer

what are we allowed to use then?
I thought we were suppose to multiply?

freckles · Answer

honestly 
I don't know what complete means

freckles · Answer

in this case

anonymous · Answer

They gave me a different formula to use. Hang on ill write it out

anonymous · Answer

$$a ^{2}-b ^{2}=(\sqrt{a ^{2}}+\sqrt{b ^{2}})(\sqrt{a ^{2}}-\sqrt{b ^{2}})=(a+b)(a-b)$$

freckles · Answer

I don't think that formula applies here...

freckles · Answer

$$(x+(3+5i))^2 \=x^2+2x(3+5i)+(3+5i)^2$$

freckles · Answer

and then you could multiply the (3+5i)^2 out too

anonymous · Answer

There is two formulas to choose from do you want me to put the other one?

freckles · Answer

We don't have to use a formula to multiply

freckles · Answer

we can just multiply

freckles · Answer

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so if we had (x+(3+5i))(x+(3+5i))
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