1)х²+8х-3 = (х- 4+√19)(х-4-√19)
Д=64+12=76
х₁=-8+√76/2=8+√4*19/2=8+ 2√19/2=4+√19
х₂=4 -√19
2) )х²-3х-2= (х-3-√17/2)(х-3+√17/2)
Д=9+8=17
х₁= 3-√17/2
х₂= 3+√17/2
1)х²+8х-3 = (х- 4+√19)(х-4-√19)
Д=64+12=76
х₁=-8+√76/2=8+√4*19/2=8+ 2√19/2=4+√19
х₂=4 -√19
2) )х²-3х-2= (х-3-√17/2)(х-3+√17/2)
Д=9+8=17
х₁= 3-√17/2
х₂= 3+√17/2