Question

Evaluate using identities 1. (91)^2

Answer 1

Answer:

Step-by-step explanation:

(91)^2 =(90+1)^2

(A+B) ^2=A^2+B^2+2AB

(90+1)^2 =(90)^2 +(1)^2+2*90*1

(91)^2 =8100+1+180

(91)^2 =8281

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Answer 2

Hello...

$(91) {}^{2}$

$(90 + 1) {}^{2}$

$(a + b) {}^{2} = a {}^{2} + 2ab + b {}^{2}$

$((90) {}^{2} + 2 \times 90 \times 1 + (1) {}^{2} )$

$(8100 + 180 + 1)$

$8281$

hope this helps you