Question

разложить на множители

Answer 1

9x^2 + 6x + 1 - 4y^2 = (3x + 1)^2 - 4y^2 = (3x + 1 - 2y) * (3x + 1 + 2y)
8c^3 - 27 = (2c)^3 - 3^3 = (2c - 3) * (4c^2 + 6c + 9)

Answer 2

9x²+6x+1-4y²=(3x)²+2.3x.1+1²-(2y)²=(3x+1)²-(2y)²=
=(3x+1+2y)(3x+1-2y)

8c³-27=(2c)³-3³=(2c-3)(4c²+6c+9)



(a³-b³=(a-b)(a²+ab+b²) , a²-b²=(a+b))a-b), a²+2ab+b²=(a+b)²)