Question

Evaluate the following using the identity (a+b)(a-b) = a²- b²

(a) (99)² - (11)²

(b) 103×97​

Answer 1

Answer:

${99}^{2} - {11}^{2} = (99 - 11)(99 + 11) \\ 88 \times 110 = 9680$

Hope its help you ❤

Step-by-step explanation:

$(100 + 3)(100 - 3) = {100}^{2} - {3}^{2} \\ 10000 - 9 = 9991$

Hope its help you ❤

Answer 2

Step-by-step explanation:

a).

(99)² -(11)²

=(99+11)(99-11). [since a²-b²=(a+b)(a-b)]

=110*88

=9680.

my knowledge if it is false please make it sure if anyone can I will be waiting for the right ans