développer B=(4x+2y-5)² 

Sagot :

MACNEL
 B=(4x+2y-5)² :
[tex]B=(4x+2y-5)*(4x+2y-5)[/tex]
[tex]B= 16x^{2} +8xy-20x+8xy+4y^{2} -10y-20x-10y+25[/tex]
[tex]B=16 x^{2} +16xy+-40x+4y^{2} -20y +25[/tex]