Question

Using identities,evaluate.
(A) 1.05×9.5

Answer 1

1.05×9.5

1.05 × 0.95 × 10

(1 + 0.05)× (1− 0.05) × 10 using identity (a)² − (b)² =(a+ b)× (a− b)

[(1)² − (0.05)²] × 10

[1 − 0.0025] × 10

0.9975 × 10

9.975 is the answer.