Question

If x⁴-5x²+4=0 then x=​

Answer 1

Answer:. (x+2)(x-2)(x+1)(x-1)=0

=> (x+2)=0 =>(x-2)=0

=> x=(-2) =>x=2

=>(x+1)=0 =>(x-1)=0

=>x=(-1) =>x=1

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