Question

Solve all the sums plzz....​

Answer 1

Answer:

$(1) (i)\: 57 \times 59 = ( {60 - 3)}^{2} \times {(60 - 1)}^{2} = 3363 \\ \\ (ii) \: \: {23}^{2} - {22}^{2} = (23 + 22)(23 - 22) = 45 \\ \\ (2) \: i \: do \: not \: know \: sorry \\ \\ (3) \frac{ {3}^{ - 5 } {10}^{ - 5} {5}^{3} }{ {5}^{ - 7} {6}^{ - 5} } = \frac{ {3}^{ - 5} {2}^{ - 5} {5}^{ - 5} {5}^{3} }{ {5}^{ - 7} {3}^{ - 5} {2}^{ - 5} } = {5}^{5} = 625$