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Rezz5
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{{a -> -8}, {a -> -8 i}, {a -> 8 i}, {a -> 8}}
spimentel
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thats not th problem. its a to the 4th power -4096 it asks to factor it out
asnaseer
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do you know this factorisation?\[a^2-b^2=(a+b)(a-b)\]
spimentel
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yes
asnaseer
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good - so first express your expression as a difference of two squares. then factorise it using this method.
asnaseer
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do you understand?
spimentel
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kool thnks
asnaseer
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yw :)
remember you can apply this multiple times. so the first factorisation might lead to another sub-expression which has a difference of two squares.