1)
(1,3m²+4n³)²=(1,3m²)² +2*1,3m²4n³+(4n³)²=1,69m^4+10,4m²n³+16n^6
2)
(2,5a²+4b)²=(2,5a²)²-2*2,5a²*4b+(4b)²=6,25a^4+20a²b+16b²
3)
(5/2p-0,5q³)²=(5/2p)²-2*5/2p*0,5q³-(0,5q³)²=25/4p²-2,5pq³-0,25q^6
4)
(2,4m³-3/4t)²=(2,4m³)²-2*2,4m³*3/4t-(3/4t)²=5,76m^6-3,6m³t-9/16t²
5)
(7/4+0,6b^4)²=(7/4)²+2*7/4*0,6b^4+(0,6b^4)²=49/16+2,1b^4+0,36b^8
6)
(3/8a-2/3b^4)^2=(3/8a)²-2*3/8*2/3ab^4+(2/3b^4)2=9/64a²-1/2ab^4+4/9b^8