Question

Using suitable identify evaluate each of the following(109) ^2-(9) ^2

Answer 1

Answer:

(109) ²-(9) ²

using identity a²-b²=(a+b) (a-b)

109²-9²=(109+9) (109-9)

=118*100=11800

Answer 2

Answer:

${109}^{2} - {9}^{2} \\identity \: used \\ = {a}^{2} - {b }^{2} = (a + b)(a - b) \\ = (109 + 9)(109 - 9) \\ = 118 \times 100 \\ = 11800 \: \: \: \: ans$