a = (x+2) au carré+9
a = (x+2)(x+2)+9
a = x au carré+x*2+2*x+2*2+9
a = x au carré+2x+2x+4+9
a = x au carré+4x+13
b = (2x+1)(2x+1)-x+3
b = 2x*2x+2x*1+1*2x+1*1-x+3
b = 4x au carré+2x+2x+1-x+3
b = 4x au carré+2x+2x-x+1+3
b = 4x au carré3x+4
c = (3x-2)(3x-2)-5(5x+3)
c = 3x*3x-3x*2-2*3x-2*2-5*5x-5*3
c = 9x au carré-6x-6x-1-25x-15
c = 9x au carré-12x-25x-1-15
c = 9x au carré-37x-16
d = (x+5) au carré+3(x+6)
d = (x+5)(x+5)+3(x+6)
d = x*x+x*5+5*x+5*5+3*x+3*6
d = x au carré+5x+5x+25+3x+18
d = x au carré+5x+5x+3x+25+18
d = x au carré+13x+43