Robert J. answered • 10/19/13
Tutor
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Certified High School AP Calculus and Physics Teacher
You can do it by regrouping.
2x3-x2+2x-1=0
=> x2(2x-1) + (2x-1) = 0
=> (x2+1)(2x-1) = 0
Answer: x = 1/2 (in real system), i and -i (in complex system).
Bella B.
10/19/13