Question

Va rog exercitiul 2! Dau coroana celui care face toate punctele (a,b,c,d)

Answer 1

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Answer 2

a)

3²×5+3²×7=

5•3²+7×3²=

(5+7)×3²=

12×3²=

12×9=

108

$b) \\ \\ {2025}^{2019} - 2024 \times {2025}^{2018} = \\ \\ (2025 - 2024) \times {2025}^{2018} = \\ \\ 1 \times {2025}^{2018} = \\ \\ {2025}^{2018}$

$c) \\ \\ ( {7}^{10} - {7}^{9}) : ( {7}^{9} - {7}^{8}) = \\ \\ (7 - 1) \times {7}^{9} : ((7 - 1) \times {7}^{8}) = \\ \\ 6 \times {7}^{9} : (6 \times {7}^{8}) = \\ \\ 7$

$d) {5}^{3} \times {2}^{6} - {5}^{3} \times {7}^{2} = \\ \\ ( {2}^{6} - {7}^{2}) \times {5}^{3} = \\ \\ (64 - 49) \times 125 = \\ \\ 15 \times 125 = \\ \\ 1875$