$\"\"$

\

The equation is $\"minus$ .

\

Rewrite the equation $\"a$

\

The above equation compare with $\"A$ , Then $\"A$ .

\

Graph the related function $\"f$

\

The equation of axis of symmetry is $\"a$

\

$\"a$ (Substitute B = 10 and A = 1)

\

$\"a$ (Simplify) $\"\"$

\

To substitute $\"a$ in the above function $\"f$ .

\

$\"\"$

\

$\"\"$ (Evalute power: $\"open$ )

\

$\"\"$ (Multiply: $\"10$ )

\

$\"\"$ (Add: $\"25$ )

\

$\"f$ (Subtract: $\"50$ )

\

The coordinates of the vertex are $\"open$ $\"\"$

\

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
\
a
\ \
f (a)
\
\
       $\"\"$ 5
\ \
     0
\
\
$\"\"$ 4
\ \
1
\
\
$\"\"$ 3
\ \
4
\
\
$\"\"$ 2
\ \
9
\
      $\"\"$ 1     16
\

\

$\"\"$

\

Graph:

\

$\"\"$

\

Above the graph the x-intercept is $\"minus$ .