Solve the equation 11-x2 equals -5?

Answer 1

11-x2=-5

add -11 to both sides:

11-x2-11=-5-11

-x2=-16

divide both sides by -2:

(-x2)/(-2)=(-16)/(-2)

x=8

If the "x2" was supposed to be "x2", meaning exponentiation, ("x squared") and not "x2", implying multiplication, ("x times two") then we'd get:

x2=16

x=±4