Раскройте скобки : а) 3(х+6); б) -5(2х+8); в) (4х-6)7, г) -9(8-5х); д) -13(5х-9)
Пример а) 3(х + 6) = 3·х + 3·6 = 3х +18
Пример а) 3(х + 6) = 3·х + 3·6 = 3х +18
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Answers & Comments
в)4x*7-6*7=28x-42
г)-9*8-5x*(-9)=-72+45x
д)-13*5x-13*(-9)=-65x+117