1does the equation x y2 3 define y as a function of x 2supp

1)does the equation x= y^2 +3 define y as a function of x ?

2)suppose f(x)=x^2-5x-6 is a quadratic function. find the range of this function.

3)find (f-g)(20 WHEN F(X)= 2x^2+3 and g(x)=-8x+9

1) x= y^2 +3, does not define y as a function of x, because some value(s) of x have more than one y.

2) f(x) = x^2 - 5x - 6

Range ====> f(x) >= -49/4

3) f(x) = 2x^2 + 3

g(x)=-8x+9

Now (f - g) = (2x^2 + 3) + 8x - 9 = 2x^2 + 8x - 6