Разложите на множители:
1) с^2 – 1; 2) x^2 – 4x + 4; 3) 25y^2 – 4; 4) 36a^2 – 60ab + 25b^2.
1) с^2 – 1; 2) x^2 – 4x + 4; 3) 25y^2 – 4; 4) 36a^2 – 60ab + 25b^2.
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Ответ:
1) (с-1)(с+1) 2) (х-2)^2 3) (5у-2)(5у+2); 4) (6а-5b)^2