Which of these expressions are equal to −2i ? Choose all that are correct. A (2−2i)2 B (1−i)(1+i) C (2−3i)−(2−i) D (2−i)−(2−i) E (−4+2i)(1+i) F (1−i)2

b and f

Step-by-step explanation:

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Subtract 3 from both sides so that the equation becomes -12x^2 + 18x - 7 = 0.
To find the solutions to this equation, we can apply the quadratic formula. This quadratic formula solves equations of the form ax^2 + bx + c = 0
                               x = [ -b ± √(b^2 - 4ac) ] / (2a)
                               x = [ -18 ± √(18^2 - 4(-12)(-7)) ] / ( 2(-12) )
                               x = [ -18 ± √(324 - (336) ) ] / ( -24 )
                               x = [ -18 ± √(-12) ] / ( -24)
The answer to this question is that there are no real solutions.