Maths-
A rectangle has sides of (2m – 1) & (2n – 1) units as shown in the figure composed of squares having edge length one unit then no. of rectangles which have odd unit length

Maths-General
- m2 – n2
- m (n + 1) n (n + 1)
- 4m + n – 2
- m2n2
Answer:The correct answer is: m2n2
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