Use expansion formula to find values of : i) (51)² ii) (97)²
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(51)²
(50+1)²
50² + 1² + 2*50*1
2500 + 1 + 100
2601
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(97)²
(100-3)²
100² + 3² - 2*100*3
10000 + 9 - 600
9400 + 9
9409
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