Выполните умножение:
1) (x+y)(х - у);
3) (k - 2)(k+ 2);
oksana341
3
11.01.2021 13:11
1
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1
1. x²-xy+yx-y²=x²-y² 2. k²+k2-2k-4=k²-4
Объяснение: