SOLUTION: Solve by any method (x – 3)(2x + 2) = -15

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Question 280190: Solve by any method

(x – 3)(2x + 2) = -15
Answer by solver91311(24713) About Me  (Show Source):
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Use FOIL to multiply the two binomials on the left:





Add 15 to both sides:



Check the discriminant:





The roots are a conjugate pair of complex numbers.

Using the rest of the quadratic formula:



Graphical validity check: The graph of does not intersect the -axis so there are no real number roots.



John