Zapisz w jak najprostrzej postaci:
a) (2a + 3c) - (4a - 4c)
b) 2(4a - 3c) + 3(2c - 3a)
c) (3a - 2)(a+3) - a(3a - 5)
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a) (2a + 3c)-(4a - 4c) = 2a + 3c - 4a + 4c = -2a + 7c
b) 2(4a - 3c)+3(2c - 3a) = 8a - 6c + 6c - 9a = -a
c) (3a - 2)(a + 3)-a(3a - 5) = 3a(a + 3) - 2(a + 3) - + 5a =
+ 9a - 2a - 6 - + 5a = 12a - 6
a) (2a+3c) -(4a-4c) = 2a+3c-4a+4c = -2a+7c
b) 2(4a-3c) +3(2c-3a) = 8a -6c +6c - 9a = -a
c) (3a -2) (a+3) -a ( 3a -5) = 3ado2 + 9a - 2a -6 -3ado2 +5a = 12a -6