Ax^2+bx+c=0 x1=-0,8 и x2=-1/5

Question

Ax^2+bx+c=0 x1=-0,8 и x2=-1/5

Answer 1

1)x^2 +2x+x+2 = 2x^2 -4x-x+2
-x^2 + 8x = 0
x^2 - 8x=0
2) 4x^2 - 6x^2 -2x = 5
2x^2 +2x +5 =0
3) 3x^2 - 2x +9x - 6= 8x^2 - 12 + 10x - 15
5x^2 +3x - 9= 0
4) 9x^2 + 4 +12x = x^2 - 3x +2x-6
8x^2 +13x - 2= 0
5) x^2 + 1 - 3x -x + 3x^2 = x
4x^2 - 5x + 1=0

Comments

Спасибо)