5х²+2х-х²+2х-40х+80=0
4х²-36х+80=0
х²-9х+20=0
х₁=9+√(81-80) = 9+1 = 5
2 2
х₂=9-√(81-80) = 9-1 =4
2 2
3m²+3m-4m-4-m²+m=0
2m²-4=0
m²=2 m₁=√2 m₂=-√2
6х²-3х-14х+7-х²-3х-х-3=0
5х²-21х+4=0
х₁=21+√(441-80) = 21+19 =4
10 10
х₂=21-√(441-80) = 21-19 =0,2
10 10
3у²-9у+у-3-2у²-4у+6у+12=0
у²-6у+9=0
у=6+√(36-36) = 3
2
4а²+12+3а+16а-10а²-24а-45а-108=0
-6а²-50а-96=0
-3а²-25а-48=0
а₁=25+√(625-576) = 25+7 =-5 1/3
- 6 - 6
а₂=25-√(625-576) = 25-7 =-3
- 6 - 6
8х²+2х-8х-2-5х²-5х+4х+4=0
3х²-7х+2=0
х₁=7+√(49-48) = 7+1 =1 1/3
6 6
х₂=7-√(49-48) = 7-1 =1
6 6