1)1) (x - 4)^2 = x^2 - 8x + 162) (3x - 5)^2 = 9x^2 - 30x + 253) (2a - 3)(2a + 3) = 4a^2 - 94) (y^2 - 2)(y^2 + 2) = y^4 - 42)а) b^2 - 0.36б) y^2 - 6y + 9 = (y - 3)^23)Подставляем a = -2/7:(2(-2/7) - 3b)3b + ((-2/7) - 3b)^2(-4/7 - 3b)3b + (-2/7 - 3b)^2(-12b/7 - 3b)3b + (-2/7 - 3b)^2(-12b^2/7 - 9b) + (-2/7 - 3b)^2(9b - 12b^2/7)(-2/7 - 3b)(-2/7 - 3b)(-2 + (12b^3/7) + 18b)(-2 + 12b^3/7)(-2 + (24b^3/7) + 36b - 18b).
1)
1) (x - 4)^2 = x^2 - 8x + 16
2) (3x - 5)^2 = 9x^2 - 30x + 25
3) (2a - 3)(2a + 3) = 4a^2 - 9
4) (y^2 - 2)(y^2 + 2) = y^4 - 4
2)
а) b^2 - 0.36
б) y^2 - 6y + 9 = (y - 3)^2
3)
Подставляем a = -2/7:
(2(-2/7) - 3b)3b + ((-2/7) - 3b)^2
(-4/7 - 3b)3b + (-2/7 - 3b)^2
(-12b/7 - 3b)3b + (-2/7 - 3b)^2
(-12b^2/7 - 9b) + (-2/7 - 3b)^2
(9b - 12b^2/7)(-2/7 - 3b)(-2/7 - 3b)
(-2 + (12b^3/7) + 18b)(-2 + 12b^3/7)
(-2 + (24b^3/7) + 36b - 18b).