Sagot :
[tex] m^{2} [/tex]+2am-2my+[tex]a^{2} [/tex]-2ay+[tex]y^{2} [/tex]
(m+a-y)(m+a-y)
m²+ma-my+ma+a²-ay-my-ay+y²
m²+y²+a²+2ma-2my-2ay
m²+ma-my+ma+a²-ay-my-ay+y²
m²+y²+a²+2ma-2my-2ay