Question

помогите решить это с помощью формул на доске!!!

Answer 1

${98}^{2} = {(100 - 2)}^{2} = \ {100 }^{2} - 2 times 100 times 2 + {2}^{2} = \ 10000 - 400 + 4 = 9604 \ {99}^{2} = {(100 - 1)}^{2} = \ {100}^{2} - 2 times 100 times 1 + {1}^{2} = \10000 - 200 + 1 = 9801 \ {103}^{2} = {(100 + 3)}^{2} = \ {100}^{2} + 2 times 100 times 3 + {3}^{2} = \ 10000 + 600 + 9 = 10609 \ {56}^{2} = {(50 + 6)}^{2} = \ {50}^{2} + 2 times 50 times 6 + {6}^{2} = \ 2500 + 600 + 36 = 3136$