Question

solve x^2-4x+85=0

Answer 1

\[x^{2}-4x+85=0\] what are you trying to do to this? factor it or solve for x?

Answer 2

lol, I thought that somehow there was a glitch in the system.

Answer 3

solve for x

Answer 4

okay

Answer 5

you'll need complete the square or GQF as the quadratic has camplex roots

Answer 6

@campbell_st you square root an expression to complete it correct?

Answer 7

Compare your quadratic equation with \(ax^2+bx+c=0\)
find a,b,c
then the two roots of x are:
\(\huge{x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}}\)

Answer 8

ugh. i forgot about that. that takes too long hartnn.

Answer 9

a simple tip for solutions is to look at the discriminant 1st

\[\Delta = b^2 - 4ac \]

helps to determine the best method for solving

Answer 10

you can rewrite the equation an

x^2 - 4x = -85

now complete the square

Answer 11

i figured it out, x=2+9i or x=2-9i

Answer 12

yup, thats correct!