Question

Evaluate using identities​

Answer 1

$\huge\boxed{Answer}$

7.83 × 7.83 - 1.17 × 1.17 / 6.66

= (7.83 + 1.17) (7.83 - 1.17) / 6.66

= 9 × 6.66 / 6.66

= 9