Question

What are roots of the equation -90=x (x-18)

Answer 1

Answer:

-90=$x$($x$-18)

-90=$x^{2}$-18$x$

$0=x^{2}-18x+90$

$x=9+3i or 9-3i$

Step-by-step explanation:

you need to use quadratic formula and you will find square root a negative ( -9 ), which is an imaginary no.

square root (-9) = 3i