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Question
Find the areas of rectangles with the following pairs of monomials as their lengths and breadths, respectively.
(p, q); (10m, 5n); (20x2, 5y2); (4x, 3x2); (3mn, 4np)
Solution
| Length | Breadth | Area |
| p | q | pq |
| 10m | 5n | 10m × 5n = 50mn |
| 20x2 | 5y2 | 20x2 × 5y2 = 100x2y2 |
| 4x | 3x2 | 4x × 3x2 = 12x3 |
| 3mn | 4np | 3mn × 4np = 12mn2p |
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