Question

let f be a real function defined by f(x) =x2-8 find x if f(x) =1
Please answer this

Answer 1

Answer:

x=9/2 or 4.5

Step-by-step explanation:

we know f(x)=1

then,

substitute this to the equation,

ie; f(x)=x2-8

1=x2-8

x2-8=1

x2=1+8

x2=9

x=9/2 or 4.5