1) 0,04x^2 - 1,2xy + 9y^2 = (0,2x)^2 - 2 * 0,2x * 3y + (3y)^2 = (0,2x - 3y)^2
2) 36c^2 +6cd + 0,25d^2 = (6c)^2 + 2 * 6c * 0,5d + (0,5d)^2 = (6c + 0,5d)^2
3) 1,96k^2 - 14kt + 25t^2 = (1,4k)^2 - 2 * 1,4k * 5t + (5t)^2 = (1,4k - 5t)^2
4) 1/49a^2 + 2/21ab + 1/9b^2 = (1/7a)^2 + 2 * 1/7a * 1/3b + (1/3b)^2 = (1/7a + 1/3b)^2
5) 1/4x^2 - 3/8xy + 9/64y^2 = (1/2x)^2 - 2 * 1/2x * 3/8y + (3/8y)^2 = (1/2x - 3/8y)^2
6) 81d^2 - 27/2cd + 9/16c^2 = (9d)^2 - 2 * 9d * 3/4c + (3/4c)^2 = (9d - 3/4c)^2
Объяснение:
1) 0,04x^2 - 1,2xy + 9y^2 = (0,2x)^2 - 2 * 0,2x * 3y + (3y)^2 = (0,2x - 3y)^2
2) 36c^2 +6cd + 0,25d^2 = (6c)^2 + 2 * 6c * 0,5d + (0,5d)^2 = (6c + 0,5d)^2
3) 1,96k^2 - 14kt + 25t^2 = (1,4k)^2 - 2 * 1,4k * 5t + (5t)^2 = (1,4k - 5t)^2
4) 1/49a^2 + 2/21ab + 1/9b^2 = (1/7a)^2 + 2 * 1/7a * 1/3b + (1/3b)^2 = (1/7a + 1/3b)^2
5) 1/4x^2 - 3/8xy + 9/64y^2 = (1/2x)^2 - 2 * 1/2x * 3/8y + (3/8y)^2 = (1/2x - 3/8y)^2
6) 81d^2 - 27/2cd + 9/16c^2 = (9d)^2 - 2 * 9d * 3/4c + (3/4c)^2 = (9d - 3/4c)^2
Объяснение: