Exercice 1
[tex]A= -7(2z-3)\\A= -14z+21\\[/tex]
[tex]B= -8(-5-3y)\\B= 40+24y[/tex]
[tex]C= 7x(3x-5)\\C= 21x^{2} -35x[/tex]
[tex]D= (x-4)X2\\D= 2(x-4)\\D= 2x-8[/tex]
Exercice 2
[tex]A=12-8x\\A=3X4-4X2x\\A= 4(3-2x)[/tex]
[tex]B= 9-72x\\B= 9X1-9X8x\\B= 9(1-8x)[/tex]
[tex]C=3x^{2} +2x\\C= 3xXx+2Xx\\C= x(3x+2)[/tex]
[tex]D=9y^{2} -3y+27\\[/tex]
D= 3 x 3y² - 3 x y + 3 x 9
D= 3(3y² - y + 9)
