SOLUTION: Suppose that r1 and r2 are the roots of the quadratic equation ax2 + bx + c = 0. Note that: (x � r1)(x � r2)= x2 � (r1 + r2)x + r1r2. Explain how to use this result to chec

Question 284790: Suppose that r1 and r2 are the roots of the quadratic equation ax2 + bx + c = 0.
Note that:
(x � r1)(x � r2)= x2 � (r1 + r2)x + r1r2.
Explain how to use this result to check the solutions of a quadratic equation of the form x2 + bx + c. Then use the result to check that �3 + 2i and �3 � 2i are solutions of the equation x2 + 6x + 13 =0.

Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
(x-(�3 + 2i))*(x-(�3 � 2i) )=0
use foil

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