Hello,

For #1, plug in the x values given into "x"; so,

y = 1/(-2 - 2);

y = 1/(-2 - 1);... and so forth

You'll get the following answers,

y = -1/4, -1/3, -1/2, -1, undefined (since you get 1/0), 1 for x = -2, -1, 0, 1, 2, 3, respectively.

2.)

x - 2*sqrt(x) = 0

-2*sqrt(x) = -x

2*sqrt(x) = x

sqrt(x) = x/2

Square both sides;

x = x^2/4

x - x^2/4 = 0

(-x^2 + 4x)/4 = 0

-x^2 + 4x = 0

-x*(x - 4) = 0

x = 0 V x = 4