(х-4)(х-6)-(х-2)(х+2)=-2
х2-6х-4х+24-х2+4=-2
-10х=-2-24-4
-10х=-30
х=3
х*х-6х-4х+24-(х*х-4)=-2
х*х-6х-4х+24-х*х+4=-2
-6х-4х=-2-24-4
х=-30:(-10)