How do you show that in the quadratic function: ax^2 + bx + c with 2 roots x1 and x2 that:

1) x1 + x2 = -b/a

and

2) x1*x2 = c/a

?

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- November 2nd 2009, 07:02 AMJQ2009quadratic function
How do you show that in the quadratic function: ax^2 + bx + c with 2 roots x1 and x2 that:

1) x1 + x2 = -b/a

and

2) x1*x2 = c/a

? - November 2nd 2009, 07:13 AMJameson
- November 2nd 2009, 08:20 AMI4talent
- November 2nd 2009, 08:48 AMsammy28

then you can plug in the values for a, b and c