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Mathematics
Mathematics
Problem
For points
A
(
2
,
1
)
A(2,1)
A
(
2
,
1
)
,
B
(
4
,
5
)
B(4,5)
B
(
4
,
5
)
and a variable point
P
(
x
,
y
)
P(x,y)
P
(
x
,
y
)
, twice the signed area of
△
A
B
P
\triangle ABP
△
A
B
P
(ignoring the absolute value) is given by a)
6
−
2
y
+
4
x
6-2y+4x
6
−
2
y
+
4
x
b)
6
+
2
y
−
4
x
6+2y-4x
6
+
2
y
−
4
x
c)
12
+
4
y
−
8
x
12+4y-8x
12
+
4
y
−
8
x
d)
6
+
2
y
+
4
x
6+2y+4x
6
+
2
y
+
4
x
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