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Luden [163]
3 years ago
15

3. Using the identity (a + b)² = (a² + 2ab + b²), evaluate 122²

Mathematics
2 answers:
Blizzard [7]3 years ago
8 0

112²

<h3><u>Using Identity</u></h3>

(a + b)² = (a² + 2ab + b²)

<h3><u>Solution</u></h3>

⇛122²

⇛(100 + 22)²

⇛(100)² + 2 × 100 × 22 + (22)²

⇛10000 + 4400 + 484

⇛14400 + 484

⇛14884

ZanzabumX [31]3 years ago
6 0

\\ \sf\longmapsto 122^2

\\ \sf\longmapsto (100+22)^2

\\ \sf\longmapsto 100^2+2(100)(22)+22^2

\\ \sf\longmapsto 10000+4400+484

\\ \sf\longmapsto 14400+484

\\ \sf\longmapsto 14884

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