<span> x^4 - 8x^3 + 17x^2 - 8x + 16 = 0
x^4 - 8x^3 + 16x^2 + x^2 - 8x + 16 = 0
x^2(x^2 - 8x + 16) + (x^2 - 8x + 16) = 0
(x^2 + 1)(x^2 - 8x + 16) = 0
(x^2 + 1)(x - 4)^2 = 0
x^2 + 1 = 0 or x - 4 = 0
x^2 = -1 or x = 4
x = +/- i or x = 4
Technically there are 2 imaginary solutions and 1 real solution.
However, since the real solution occurs twice (multiplicity 2), you
could say there are 2 real solutions (although they're the same). So the
second answer would apply. </span>
I think they use experimental probabilities because experiment probabilities are WAY reliable than theoretical probability
Five million one hundred sixty five thousand eight hundred seventy four.
There will be 84 people with flu after 11 days if I am right
