Using the identity. (a - b) ²= (a² - 2ab + b²), evaluate 699²

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Sivi asked Sep 9, 2022

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Using the identity. (a - b) ²= (a² - 2ab + b²), evaluate 699²

Mathematics
college

Sivi asked Sep 9, 2022

by Sivi

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$\\ \sf\longmapsto 699^2$

$\\ \sf\longmapsto (700-1)^2$

$\\ \sf\longmapsto 700^2-2(700(1)+(1)^2$

$\\ \sf\longmapsto 490000-1400+1$

$\\ \sf\longmapsto 488600+1$

$\\ \sf\longmapsto 488601$

Joseph Larson answered Sep 10, 2022

by Joseph Larson

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Using the identity. (a - b) ²= (a² - 2ab + b²), evaluate 699²-example-1

PollusB answered Sep 14, 2022

by PollusB

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