Question

Use the identity (a – b)2 = a2 – 2ab + b2

and find the square of 189.​

Answer 1

Answer:

$189 = {(200 - 11)}^{2} \\ = {200}^{2} - 2 \times 200 \times 11 + {11}^{2} \\ = 40000 - 4400 + 121 \\ = 40121 - 4400 \\ = 39721$

Answer 2

Step-by-step explanation:

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