Question

Solve x^2 + 2x + 9 = 0

Answer 1

by discrimante method

Answer 2

D = b^2-4ac = 4 - 36 = -32

Answer 3

Solving Quadratic Equations with Complex Numbers

Answer 4

x1 = (-2 - 4*i*sqrt(2))/2

Answer 5

x2 = (-2 + 4*i*sqrt(2))/2

Answer 6

And when u pull out a two and cancel with the bottom:
x1 = -1-2*i*sqrt(2)
x2 = -1+2*i*sqrt(2)

Answer 7

ohhhhhh ok

Answer 8

the equation for x is:
(-b - sqrt(D))/(2a)

Answer 9

sqrt(D) = sqrt(-32) = sqrt(-1*16*2) = sqrt(-1)*sqrt(16)*sqrt(2) = i*4*sqrt(2) = 4i*sqrt(2)

Answer 10

thank you