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nazarbobobo
@nazarbobobo
June 2023
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chanaptk2000
1)
а) 0,2 . 25 = 5
б) 8 - 16 - 1 = -23
2)
а) (а^2)^3 . a^5 = a^6 . a^5 = a^11
б) (b^4)^5 : (b^3)^4 = b^20 : b^12 = b^8
3)
а) -0,2a^2bc^4 . 7ab^3c^5 = -1,4a^3b^4c^9
б) 0,5m^2 n . (4mn^3)^2 = 0,5m^2 n . 16m^2 n^6 = 8m^4 n^7
в) (3m^2 - m) + (2m -3) - (m^2 - 3) = 3m^2 - m + 2m - 3 - m^2 + 3 = 2m^2 + m + 0 = m(2m+ 1)
г) -2mn ( m^2 - 4mn + n^2)
д) (a+7) (a-4) - a(a+3) = a^2 -4a + 7a - 28 - a^2 -3a = -28
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Answers & Comments
а) 0,2 . 25 = 5
б) 8 - 16 - 1 = -23
2)
а) (а^2)^3 . a^5 = a^6 . a^5 = a^11
б) (b^4)^5 : (b^3)^4 = b^20 : b^12 = b^8
3)
а) -0,2a^2bc^4 . 7ab^3c^5 = -1,4a^3b^4c^9
б) 0,5m^2 n . (4mn^3)^2 = 0,5m^2 n . 16m^2 n^6 = 8m^4 n^7
в) (3m^2 - m) + (2m -3) - (m^2 - 3) = 3m^2 - m + 2m - 3 - m^2 + 3 = 2m^2 + m + 0 = m(2m+ 1)
г) -2mn ( m^2 - 4mn + n^2)
д) (a+7) (a-4) - a(a+3) = a^2 -4a + 7a - 28 - a^2 -3a = -28