Question

(x-4)(x-5)(x-10)(x-2)=18^2

Answer 1

х^4-400=18^2
x^4-400=324
x^4=324+400
x^4=724

Answer 2

(х^2+20)(х^2+20)=18^2 х^4+400=396 400-396=х^4 х=1