16,16 заранее спасибо

Question

16,16 заранее спасибо

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Answer 1

1)=0,0004р^6k²+0.8p^5k^5+400p^4k^8
2)=49/36m²n²-2*7/6*4/21m³n^6+16/441m^4n^10=49/36m²n²-4/9m³n^6+16/441m^4n^10
3)=-15(1/9a²-2/15ab+1/25b²)=-5/3a²+2ab-3/5b²
4)=7x(x^6-4x^4+4x²)=7x^7-28x^5+28x³

Answer 2

5) (25y²-20y+4)(2y+1)=50y³-40y²+8y+25y²-20y+4=50y³-15y²-14y+4;
6) (100p²-20pk+k²)(100p²+20pk+k²)=10000p⁴+2000p³k+100p²k²-2000p³k-400p²k²-20pk³+100p²k²+20pk³+k⁴=10000p⁴-200p²k²+k⁴;
7) m²-4mn+4n²+6m-12n+9;