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Use the identity and find the square of 189. (a – b) 2 = a 2 – 2ab + b 2

 Use the identity and find the square of 189.

(a – b)= a2 – 2ab + b2

Grade:12

1 Answers

Harshit Singh
askIITians Faculty 5964 Points
one year ago
Dear Student

189 = (200 – 11)^2

= 40000 – 2 x 200 x 11 + 11^2

= 40000 – 4400 + 121

= 35721

Thanks

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