Cрочно. 40 ! разложите на множители: 1) c ^2 −1; 2) x ^2 −4x +4; 3) 25y^ 2 −4; 4) 36a ^2 −60ab +25b^ 2

1) c^2-1=(c-1)*(c+1)
2) x^2-4x+4=(x-2)*(x-2)
3) 25y^2-4=(5y-2)*(5y+2)
4) 36a^2-60ab+25b^2=(6a-5b)*(6a-5b)

C^2 -1= (c+1)*(c-1)

x^2 -4x +4= (x-2)*(x-2)

25y^2 - 4 = (5y - 2)*(5y + 2)

36a^2 - 60ab + 25b^2 = (6a - 5b)*(6a - 5b)