a)
(k+2)^2=k^2+4k+4
b)
(3x+1)^2=9x^2+6x+1
c)
(2k+m)^2=4k^2+4km+m^2
d)
(t+5w)^2=t^2+10tw+25w^2
e)
(x+\frac{1}{2})^2=x^2+2x*\frac{1}{2}+(\frac{1}{2})^2=x^2+x+\frac{1}{4}
f)
(a+\sqrt2)^2=a^2+2\sqrt2a+2
wzór skróconego mnożenia
(a+b)^2=a^2+2ab+b^2 kwadrat sumy