SOLUTION: the polynomial: ax ³ + bx ² + cx + d = 0 show that: 1. x1 + x2 + x3 = - b / a 2. x1.x3 x1.x2 + + x2.x3 = c / a 3.x1.x2.x3 = -d / a please help, thank you

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: the polynomial: ax ³ + bx ² + cx + d = 0 show that: 1. x1 + x2 + x3 = - b / a 2. x1.x3 x1.x2 + + x2.x3 = c / a 3.x1.x2.x3 = -d / a please help, thank you      Log On


   

Question 847833: the polynomial: ax ³ + bx ² + cx + d = 0 show that:
1. x1 + x2 + x3 = - b / a
2. x1.x3 x1.x2 + + x2.x3 = c / a
3.x1.x2.x3 = -d / a
please help, thank you
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
You can write in the form . Expanding the RHS and equating like terms yields the desired result.