Question

X^2-5x+5=-x^2-x-(-3-8x^2)

Answer 1

x^2 - 5x + 5 = - x^2 - x + 3 + 8x^2
x^2 + x^2 - 8x^2 - 5x + x + 5 - 3 = 0
- 6x^2 - 4x + 2 = 0
3x^2 + 2x - 1 = 0
D = b^2 - 4ac = 4 + 12 = 16 = 4^2
x1 = ( - 2 + 4) / 6 = 1/3
x2 = ( - 2 - 4) / 6 = - 1