Sagot :
Bonjour
A=(x+3)°2 = x² + 6x + 9
B=(x+8)°2 = x² + 16x + 64
C=(x+12)°2 = x² + 24x + 144
D=(x+1)°2 = x² + 2x + 1
E=(x+5)(x-5) = x² - 25
F=(4-x)°2 = 16 - 8x + x².
Explications étape par étape:
A=(x+3)(x+3)
A=x^2+3x+3x+9
A=x^2+6x+9
B=(x+8)(x+8)
B=x^2+8x+8x+64
B=x^2+16X+64
C=(X+12)(X+12)
C=X^2+12X+12X+144
C=X^2+24X+144
D=(X+1)(X+1)
D=X^2+X+X+1
D=X^2+2X+1
E=(X+5)(X+5)
E=X^2+5X+5X+25
E=X^2+10X+25
F=(4-X)(4-x)
F=16-4x-4x+x^2
F=x^2-8x+16