Verified answer

[tex] {79}^{2} - {29}^{2} = (79 - 29) \times (79 + 29) = 50 \times 108 = 5400 \\ \green{5400 \div 50 = 108}[/tex]

(79 - 29) × (79 + 29) получили по формуле:

[tex] {a}^{2} - {b}^{2} = (a - b) \times (a + b)[/tex]