Réponse:
[tex]{4}^{2} - (5 - 8x)= (4 + 5 - 8x)(4 - 5 + 8x) = (9 - 8x)( - 1 + 8x) \\ [/tex]
[tex]28x - {35x}^{2} = 7x(4 - 5x)[/tex]
[tex](2x - 5)(7x + 6) - (2x - 5)(9x - 1) = (2x - 5)(7x + 6 - 9x + 1) = (2x - 1)( - 2x + 7)[/tex]
[tex] {(3x + 8)}^{2} - {(11 - 7x)}^{2} = (3x + 8 + 11 - 7x)(3x + 8 - 11 + 7x) = ( - 4x + 19)(10x - 3)[/tex]
