[tex]A = x^2 -20x+100 = (x-10)^2[/tex]
[tex]B = (2x-5)^2-25 = (2x-5+5)(2x-5-5)=2x(2x-10)=4x(x-5) [/tex]
[tex]C = (5x+9)(3x-1)-(3x-1)^2 = 2(x+5)(3x-1) [/tex]
[tex]D = 4y^2 +24y+36 = 4(y+3)^2[/tex]
[tex]E = 64y^2 -81t^2 = (8y-9t)(8y+9t) [/tex]
En espérant t'avoir aidé
