What are the restrictions on x? square root of 5x^2

Zahra wants the equation below to have an infinite number of solutions when the missing number is placed in the box.

Acompany had forty one employees and ordered nine hundred eighty uniforms for them. if they wanted to give each employees the same number of uniforms, how many more uniforms should they order so they don't have any extra

If f(x)=x^2- 4 and g(x)=x^2 plus 2 x, (c) (f-/3) = ? (simplify your answer.)