Mirage86

I hope this helps you

stas1geo55

а) (-m-n)²=(-m)²-2(-m)n+n²=m²+2mn+n²

б) (-b+5)²=(5-b)²=25-10b+b²=b²-10b+25

г) (-4с-3d)²=(-4c)²-2(-4)c•3d+(3d)²=16c²+24cd+9d²

д) (-k-1,5)²=(-k-3/2)²=k²+3k+9/4=k²+3k+2,25