Répondre :
(x-7)²=(x)²-2*x*x+(7)²=x²-14x+49
(11-6x)(11+6x)=(11)²-(6x)²
(4x+3)²=(4x)²+2*3*4x+9=16x²+24x+9
(6x+5)²=(6x)²+2*6x*5+25=36x²+60x+25
(4x-13)(4x+13)=(4x)²-169=16x²-169
(11-6x)(11+6x)=(11)²-(6x)²
(4x+3)²=(4x)²+2*3*4x+9=16x²+24x+9
(6x+5)²=(6x)²+2*6x*5+25=36x²+60x+25
(4x-13)(4x+13)=(4x)²-169=16x²-169