AP=2X,BQ=4X,
∴BP=12-2X,
SΔABC=1/2×12×24=144,
SΔBPQ=1/2×4X×(12-2X)=24X-4X^2,
∴Y=144-(24X-4X^2)
=4X^2-24X+144
⑵根据题意得不等式组:
{12-2X>0,
{4X
AP=2X,BQ=4X,
∴BP=12-2X,
SΔABC=1/2×12×24=144,
SΔBPQ=1/2×4X×(12-2X)=24X-4X^2,
∴Y=144-(24X-4X^2)
=4X^2-24X+144
⑵根据题意得不等式组:
{12-2X>0,
{4X