Question

Evaluate using identity 10.5 X 9.5​

Answer 1

Answer:

here you can see

10.5x9.5

(10+0.5)(10-0.5)

=

${10}^{2} - {0.5}^{2}$

= 100-0.25

=99.75

Answer 2

Answer:

$10.5 \times 9.5 \\ (10 + 0.5)(10 - 0.5) \\ (a + b)(a - b) = {a }^{2} - {b}^{2} \\ so \: \: a = 10 \: and \: b = 0.5 \\ {10}^{2} - {0.5}^{2} \\ = 100 - 0.25 \\ = 99.75$