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Mathematics
Problem
Find the area of curve enclosed by :
∣
x
+
y
∣
+
∣
x
−
y
∣
≤
4
|x + y| + |x - y| \le 4
∣
x
+
y
∣
+
∣
x
−
y
∣
≤
4
,
∣
x
∣
≤
1
|x| \le 1
∣
x
∣
≤
1
,
y
≥
x
2
−
2
x
+
1
y \ge \sqrt{x^2 - 2x + 1}
y
≥
x
2
−
2
x
+
1
.
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