Question

Solve x2+2x+9=0

Answer 1

x = (-b+-sqrt(b^2-4ac))/(2a)


x = (-(2)+-sqrt((2)^2-4(1)(9)))/(2(1))


x = (-2+-sqrt(4-(36)))/(2)


x = (-2+-sqrt(-32))/2


x = (-2+sqrt(-32))/2 or x = (-2-sqrt(-32))/2


x = (-2+4i*sqrt(2))/2 or x = (-2-4i*sqrt(2))/2


x = -1+2i*sqrt(2) or x = -1-2i*sqrt(2)


So the solutions are x = -1+2i*sqrt(2) or x = -1-2i*sqrt(2)

Answer 2

Thank you!

Answer 3

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