помогите пожалуйста решить два примера.
1) - 3х^ + 2х + 9= - х^+4х +(-2- 2х^)
2) 3х^-4х-3= х^ + х + (1+2х^)
1) - 3х^ + 2х + 9= - х^+4х +(-2- 2х^)
2) 3х^-4х-3= х^ + х + (1+2х^)
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1)- 3х² + 2х + 9= - х²+4х +(-2- 2х²)
- 3х² + 2х + 9= - х²+4х -2- 2х²
- 3х² + х² +2х² + 2х - 4х = -2 -9
-2х = -11
2х = 11
х = 11/2 = 5,5
2)
3х²-4х-3= х² + х + (1+2х²)
3х²-4х-3= х² + х + 1 + 2х²
3х²-х²-2х²-4х-х=1+3
-5х=4
5х=-4
х=-4/5=-0,8