Solution,

The analytical formula of parabola is y.

=-X-4；

(2) Point (X) where point P moves

，0)，BP2

=

BD？

BC,

Jean x

=

0，y

=

-4

∴ The coordinate C(0, -4) of the point. should

∫PD∑ communication,

∴△BPD∽△BAC，

∴。

B.C.

=,

ab blood type

=

6、BP

=

x-(-2)= 1

x

+2。

∴BD

===。

* BP2

=

Bachelor of science

B.C.

∴(x

+2)2

=

Solution X 1

=

X2

=

The coordinates of -2(-2 unqualified problem, rounded) are in

Point P(0), that is, when moving point P(0), BP2

=

BD？

BC;

(3)∑△BPD of ∑△

Binary-Analog Conversion

one

∴×

∴BPC and S△=

X(X

+2)*

four

-

When x

=

1, S△BPC is at most 3. about

That is, the coordinates of point P (1, 0) and the delta △PDC area.