ТЕСТ 25.Разложение разности квадратов на множители.Вариант 3,часть 1.
разложить на множители:
1) a^2-36b^2
2)1/25y^4-x^2(1/25-дробь)
3)25y^2-(11+4y)^2
4)x^2-8xy+16y^2-z^2
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