Answer:
2.5
Step-by-step explanation:
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a=1: x2 + -6 x=-13
Complete the square:
x2 – 6x + 9 =–13 + 9
Factor the trinomial and simplify:
(x + -3 )²= -4
Use the square root property of equality to solve
(x – 3)2 = –4.
The solutions are
3 ± 2i
