а) (x-8)2 = x2 - 16x + 64б) (a+4c)2 = a2 + 8ac + 16c2в) (2x-3) (2x+3) = 4x2 - 9г) (7a+2c) (7a-2c) = 49a2 - 4c2
(x-5)2 - (45-16x) = x2 - 10x + 25 - 45 + 16x = x2 + 6x - 20
а) 9x2 - 16c2 = (3x + 4c)(3x - 4c)б) x2 + 10xy + 25y2 = (x + 5y)(x + 5y)
x(x-2) = (x-4)2 + xx^2 - 2x = x^2 - 8x + 16 + x-2x = -8x + 166x = 16x = 16/6x = 8/3
а) (5x+y^2) (5x-y^2) = 25x^2 - y^4б) (3c+c^3)2 = 9c2 + 6c^4 + c^6в) (a+x)2(a-x)2 = (a^2 - x^2)^2 = (a^2 - x^2)(a^2 - x^2) = a^4 - 2a^2x^2 + x^4
а) x^4 - 0.36y^2 = (x^2 + 0.6y)(x^2 - 0.6y)б) 25 - (x-2)2 = 25 - (x^2 - 4x + 4) = 25 - x^2 + 4x - 4 = 21 + 4x - x^2в) a^6 - c^9 = (a^2)^3 - (c^3)^3 = (a^2 - c^3)(a^4 + a^2c^3 + c^6)
а) (x-8)2 = x2 - 16x + 64
б) (a+4c)2 = a2 + 8ac + 16c2
в) (2x-3) (2x+3) = 4x2 - 9
г) (7a+2c) (7a-2c) = 49a2 - 4c2
(x-5)2 - (45-16x) = x2 - 10x + 25 - 45 + 16x = x2 + 6x - 20
а) 9x2 - 16c2 = (3x + 4c)(3x - 4c)
б) x2 + 10xy + 25y2 = (x + 5y)(x + 5y)
x(x-2) = (x-4)2 + x
x^2 - 2x = x^2 - 8x + 16 + x
-2x = -8x + 16
6x = 16
x = 16/6
x = 8/3
а) (5x+y^2) (5x-y^2) = 25x^2 - y^4
б) (3c+c^3)2 = 9c2 + 6c^4 + c^6
в) (a+x)2(a-x)2 = (a^2 - x^2)^2 = (a^2 - x^2)(a^2 - x^2) = a^4 - 2a^2x^2 + x^4
а) x^4 - 0.36y^2 = (x^2 + 0.6y)(x^2 - 0.6y)
б) 25 - (x-2)2 = 25 - (x^2 - 4x + 4) = 25 - x^2 + 4x - 4 = 21 + 4x - x^2
в) a^6 - c^9 = (a^2)^3 - (c^3)^3 = (a^2 - c^3)(a^4 + a^2c^3 + c^6)