Răspuns:
x² - mx - 32 =0
x1 = 8
8²-8m-32=0
64-8m-32=0
32-8m=0 /:8
4-m=0
-m=-4
m=4
x²-4x-32=0
x²-8x+4x-32=0
x(x-8)+4(x-8)=0
(x+4)(x-8)=0
x+4=0
x2=-4
