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If f(x) = x^3 - 2x^2 , which expression is equivalent to ff(i)?
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If f(x) = x^3 - 2x^2 , which expression is equivalent to ff(i)?

User Sola Oderinde
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i=√(-1)\to i^2=-1\\\\f(x)=x^3-2x^2\\\\f(i)=i^3-2(i^2)=i\cdot i^2-2(-1)=i(-1)+2=2-i
User Hbabbar
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