July 2022 1 2 Report
СРОЧНО. Даю 40 баллов.
1.Разложите на множители: а)25m^2+30mn+9n^2 б)y^2-10y+25-4m^2

2.Докажите, что (ab-1)^2+(a+b)^2=(a^2+1)(b^2+1)

3.Упростите (a+26)(a-26)(a^2+46^2)
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