Question

16,16 заранее спасибо

Answer 1

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;