УПРОСТИТЕ ВЫРАЖЕНИЕ....
4a(a+2)-(a+4)²=4a²+8a-a²-8a-16=3a²-16 3m(m+2)-(m+3)²=3m²+6m-m²-6m-9=2m²-9 3(x-1)²+6x=3x²-6x+3-6x=3x²-3=3(x²+1) 6d+3(d-1)²=6d+3d²-6d+3=3d²+3=3(d²+1) 4ab+2(a-b)²=4ab+2a²-4ab+2b²=2a²+2b²=2(a²+b²) 5(x+y)²-10xy=5x²+10xy+5y²-10xy=5x²+5y²=5(x²+y²)