Mathematics
Grade10
Easy
Question
Find the product. (2a + 3b)2
- 4a2 + 9b2
- 4a2 + 12ab + 9b2
- 4a2 – 12ab + 9b2
- 4a2 + 12ab – 9b2
The correct answer is: 4a2 + 12ab + 9b2
Using the pattern (a + b)2 = a2 + 2ab + b2,
(2a + 3b)2 = 4a2 + 22a3b + 9b2 = 4a2 + 12ab + 9b2
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