Mathematics
Grade10
Easy
Question
Find the product. 912
- 8281
- 8761
- 8161
- 8521
The correct answer is: 8281
Using the pattern (a + b)2 = a2 + 2ab + b2,
912 = (90 + 1)2 = 902 + 2
90
1 + 12 = 8100 + 180 + 1 = 8281
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