Question

Evaluate using suitable identity: (102)^2-(98)^2

Answer 1

Step-by-step explanation:

${(102)}^{2} - {(98)}^{2} \\ using \: the \: formula \: \\ {a}^{2} - {b}^{2} = (a + b)(a - b) \\ {(102)}^{2} - {(98)}^{2} = (102 + 98)(102 - 98) \\ = (200)(4) \\ = 800$