Question

use an expansion formula to find the values.
1)(97)^2
2)(1005)^2

Answer 1

$(90 + 7) ^{2} = 8100 + 49 + 2(7)(90) = 8149 + 1260 = 9409 \\ \\ (1000 + 5) {}^{2} = 1000000 + 25 + 2(1000)(5) = 1000025 + 10000 = 1010025$