Mathematics
Grade10
Easy
Question
Find the product. (3a – 4b)(3a + 4b)
- 9a2 – 16b2
- 9a2 + 16b2
- 9a2 – 24ab + 16b2
- 9a2 + 24ab – 16b2
The correct answer is: 9a2 – 16b2
Using the pattern (a + b)(a – b) = a2 – b2,
(3a + 4b)(3a – 4b) = 9a2 – 16b2
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