Math, asked by vidyarathi2714, 1 year ago

Evaluate using identities 1. (91)^2

Answers

Answered by bansupatel
1

Step-by-step explanation:

91×2=(1+90)(1+1)

=(1)square +1(90+1)+90×1

=1+1×91+1

=2×91

=182

Answered by mysticd
2

Answer:

91² = 8281

Step-by-step explanation:

(91)²

= (100-9)²

= 100²-2×100×9+9²

/* By algebraic identity:

(a-b)² = - 2ab + */

= 10000 - 1800 + 81

= 8200+81

= 8281

Therefore,

91² = 8281

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