A)x^2+2x-63=0 б)0,9x-3x^2=0 в)2x^2-5x+2=0 г)x^2-2x-6=0

Question

Алгебра: A)x^2+2x-63=0 б)0,9x-3x^2=0 в)2x^2-5x+2=0 г)x^2-2x-6=0

Ришат12333323 · Answer

а) х** + 2х - 63 = 0

х(х + 2) = 63

[x = 63 [x = 63

[x + 2 = 63 [x = 61

б)0.9x - 3x** = 0

3x(0.3 - x) = 0

[3x = 0 [x = 0

[0.3 - x = 0 [x = 0.3

в)2х** - 5х + 2 = 0

х(2х - 5) = -2

[x = -2 [x = -2

[2x -5 = -2 [x = 1.5

г)х** - 2х - 6 = 0

х(х - 2) = 6

[x = 6 [x = 6

[x - 2 = 6 [x = 8