Sagot :
(6x+2)(x-3)+(7x-4)(2x-5)=6x^2-12x+2x-6+14x^2-45x-8x+20=20x^2-63x+14
(8/3x+3/4)^2=64/9x+6x+9/16
(8/3x+3/4)^2=64/9x+6x+9/16
Coucou !
(6x+2)(x-3)+(7x-4)(2x-5)
=6x²-12x+2x-6+14x²-45x-8x+20
=20x²-63x+14
(8/3x+3/4)²
=64/9x+6x+9/16
J'espère t'avoir aider