Use the quadratic formula to solve the equation.

Question

-x^2+5x=11

a.5/2 +- sqrt13/2
b.-5/2 +- sqrt13/2
c.2/5 +- sqrt13/2
d.-2/5 +- sqrt13/2

Answer 1

first make the equation more presentable
....

x^2 - 5x + 11 = 0

x = (5 ± √-19)/2

none of the answers match this, so there has to be a typo.

since all answers contain √13
your equation could have been
x^2 - 5x + 3 = 0
that would give you x = (5 ± √13)/2, which matches a)

check your typing.

Answer 2

the equation i posted is the equation i have to use.

Answer 3

then, as I said before,

x = (5 ± √-19)/2

none of the choices match, that's all there is to say.