Question

solve using expansions and identities (107)2

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Answer 1

Answer:

${}11449$

Step-by-step explanation:

$(107) {}^{2} \\ = (100 + 7) {}^{2}$

Since

$(x + y) {}^{2} = {x}^{2} + {y}^{2} + 2xy$

So

$= {100}^{2} + {7}^{2} + 2(100)(7) \\ \\ = 10000 + 49 + 1400 \\ \\ = 11449$