а) 16х^2-у^4
б)а^4-10^3+25х^2
в)((х-3)(х×3))^2=(х^2-9)^2=х^4-18х^2+81
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а) 16х^2-у^4
б)а^4-10^3+25х^2
в)((х-3)(х×3))^2=(х^2-9)^2=х^4-18х^2+81