$\"\"$

(a)

The equation is $\"\"$ and the point is $\"\"$ .

$\"\"$ (Write original eqation)

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Subtract: $\"\"$ )

$\"\"$ . (Extract square root)

Since the above statement is true, the point $\"\"$ is a solution of $\"\"$ , and

The point $\"\"$ lies on the graph of $\"\"$ .

$\"\"$

(b)

The equation is $\"\"$ and the point is $\"\"$ .

$\"\"$ (Write original equation)

$\"\"$ (Substitute $\"\"$ )

$\"\"$

$\"\"$ . (Simplify)

Since the above statement is true, the point $\"\"$ is a solution of the equation $\"\"$ , and

The point $\"\"$ lies on the graph of $\"\"$ . $\"\"$

(a) The point $\"\"$ lies on the graph of $\"\"$ .

(b) The point $\"\"$ lies on the graph of $\"\"$ .