# SOLUTION: Please help! 1.) Find all zeros(both real and complex) of the function f(x)=x^4+4x^2-5 2.) Will sells used 4-wheelers and bicycles. He currently has 46 of these machines

Algebra ->  Algebra  -> Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: Please help! 1.) Find all zeros(both real and complex) of the function f(x)=x^4+4x^2-5 2.) Will sells used 4-wheelers and bicycles. He currently has 46 of these machines      Log On

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 Algebra: Complex Numbers Solvers Lessons Answers archive Quiz In Depth

 Question 64502: Please help! 1.) Find all zeros(both real and complex) of the function f(x)=x^4+4x^2-5 2.) Will sells used 4-wheelers and bicycles. He currently has 46 of these machines for sale. If there are 146 wheels on all of these machines, how many 4-wheelers and how many bicycles does Will have for sale? Thank you!!!!Answer by stanbon(57290)   (Show Source): You can put this solution on YOUR website!Find all zeros(both real and complex) of the function f(x)=x^4+4x^2-5 =(x^2+5)(x^2-1) =(x+isqrt5)(x-isqrt5)(x+1)(x-1) Zeroes are 1,-1,isqrt5,-isqrt5 ---------------------- 2.) Will sells used 4-wheelers and bicycles. He currently has 46 of these machines for sale. If there are 146 wheels on all of these machines, how many 4-wheelers and how many bicycles does Will have for sale? Let # of 4-wheelers be W and # of bicycles be B: B+W=46 2B+4W=146 -------------- B=46-W 2(46-W)+ 4W=146 92-2W+4W=146 2W=54 W=27 (# of 4-Wheelers) )B=46-27=19 (# of bicycles) --------------- Cheers, Stan H.