а3. Д=1-4*1*(-12)=49 (7)
х=1+7/2=4 х=1-7/2=-3
а4.
Д=441-4*7*0=441(21)
х=-21+21/14=0 х=-21-21/14=-3
-3+0=-3
а3. Д=1-4*1*(-12)=49 (7)
х=1+7/2=4 х=1-7/2=-3
а4.
Д=441-4*7*0=441(21)
х=-21+21/14=0 х=-21-21/14=-3
-3+0=-3