С.Р.No3. Заполните пропуски, чтобы получились верные равенства.
1.(m + ... )^2 = m^2 + 6m + 9.
2.(... - 2а)^2 = 16 –... + 4а^2
4.(6х + ...)^2 = ... +...+25у^2
+ 25y?
5.(3х - ...)(3х +....) = 9x^2 - 16у^2.
1.(m + ... )^2 = m^2 + 6m + 9.
2.(... - 2а)^2 = 16 –... + 4а^2
4.(6х + ...)^2 = ... +...+25у^2
+ 25y?
5.(3х - ...)(3х +....) = 9x^2 - 16у^2.
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