а) (х-8)2 = x^2 - 16x + 64б) (а+4с)2 = a^2 + 8acs + 16c^2в) (2х-3) (2х+3) = 4x^2 - 9г) (7а+2с) (7а-2с) = 49a^2 - 4c^2
(x-5)2 - (45-16x) = x^2 - 10x + 25 - 45 + 16x = x^2 + 6x - 20
а) 9х2-16с2 = (3x + 4c)(3x - 4c)б) х2+10ху+25у2 = (x + 5y)^2
x(x-2)= (x-4)2+xx^2 - 2x = x^2 - 8x + 16 + xx^2 - 2x = x^2 - 7x + 162x = 16x = 8
а) (5х+у2) (5х-у2) = 25x^2 - у^4б) (3с+с3)2 = 9c^2 + 6c^3 + c^6в) (а+х)2(а-х)2 = (a^2 - x^2)^2 = (a^2 - x^2)(a^2 - x^2) = a^4 - 2a^2x^2 + x^4
а) х4-0,36у2 = (x^2 - 0.6y)(x^2 + 0.6y)б) 25-(х-2)2 = 25 - (x^2 - 4x + 4) = 25 - x^2 + 4x - 4 = 21 + 4x - x^2в) а6- с9 = (a^2 - c^3)(a^4 + a^2c^3 + c^6)
а) (х-8)2 = x^2 - 16x + 64
б) (а+4с)2 = a^2 + 8acs + 16c^2
в) (2х-3) (2х+3) = 4x^2 - 9
г) (7а+2с) (7а-2с) = 49a^2 - 4c^2
(x-5)2 - (45-16x) = x^2 - 10x + 25 - 45 + 16x = x^2 + 6x - 20
а) 9х2-16с2 = (3x + 4c)(3x - 4c)
б) х2+10ху+25у2 = (x + 5y)^2
x(x-2)= (x-4)2+x
x^2 - 2x = x^2 - 8x + 16 + x
x^2 - 2x = x^2 - 7x + 16
2x = 16
x = 8
а) (5х+у2) (5х-у2) = 25x^2 - у^4
б) (3с+с3)2 = 9c^2 + 6c^3 + c^6
в) (а+х)2(а-х)2 = (a^2 - x^2)^2 = (a^2 - x^2)(a^2 - x^2) = a^4 - 2a^2x^2 + x^4
а) х4-0,36у2 = (x^2 - 0.6y)(x^2 + 0.6y)
б) 25-(х-2)2 = 25 - (x^2 - 4x + 4) = 25 - x^2 + 4x - 4 = 21 + 4x - x^2
в) а6- с9 = (a^2 - c^3)(a^4 + a^2c^3 + c^6)