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Hello, good afternoon. I need help with my precalc hw. we are learning about finding zeros I don't which method I should use for this problem: if i is a zero of x^3+3x^2+ix+(4+i) what do i do? 
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Find the magnitude and direction angle of the vector v. v= 8(cos135 degrees i + sin135 degrees J) I think that the answer is v= 5 and Q = 135. Am I correct? 
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D(x) = x^2+2x E(x) = 2/(5x1) D/E= 
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C(x)={(x,y)y=4x5} D(x)=x^2+2x C(D)= 
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D(x)=x^2+2x h(x)=7 h(D)= 
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G(x)=2x+7 H(x)=1/(x+2) 1) H(G(x))= J: y=3x^2 2) J(H(x))= 3) J/H= 
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without usig technology determine is cos135 degres= sin225 degrees 
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b^2=13^+8^22(13)(8)cos135 
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6*(9^(1/x))13*(6^(1/x))+6*(4^(1/x))=0 
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