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11.3
Mnożenie sum
algebraicznych
Na rysunku pokazano, jak mnożyć sumy algebraiczne. Wpisz odpowiednie
wyrażenia w figurach, a następnie uzupełnij obliczenia.
a)(a + 2)(b+3)
b+a 3+2 b + 2.3 =
=
=
a
b) a + 2b) (a-7)= K
-
.
c) (m-2).(n-m) = OK OC
+
AK-A
AK
11
=
W tym przykładzie
dopisz też znaki + i -.
Sagot :
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