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BellaThompson
@BellaThompson
July 2022
1
12
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5. Раскройте скобки:
1) (5а - 6) ∙ 12
2) 7(5х – 6у + 7)
3) (2а + 5 – 3b) ∙ 14
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smirnovaAn
1)(5а-6)•12= 5а•12-6•12= 60а-72
2)7(5х-6у+7)= 7•5х-7•6у+7•7=35х-42у+49
3)(2а+5-3b)•14=2a•14+5•14-3b•14=28a+70-42b
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Answers & Comments
2)7(5х-6у+7)= 7•5х-7•6у+7•7=35х-42у+49
3)(2а+5-3b)•14=2a•14+5•14-3b•14=28a+70-42b