1) (x - 5)^2 = x^2 - 10x + 25,
2) (x - 3)(x + 3) = x^2 - 9;
3) (4a + 7b)^2 = 16x^2 + 56ab + 49b^2;
4) (5x - y)(y + 5x) = 25x^2 - y^2.
Спасибо
1) (x - 5)^2 = x^2 - 10x + 25,
2) (x - 3)(x + 3) = x^2 - 9;
3) (4a + 7b)^2 = 16x^2 + 56ab + 49b^2;
4) (5x - y)(y + 5x) = 25x^2 - y^2.
Спасибо