Answers

2014-08-03T14:20:40+08:00
X^3+3x²y+3xy²+y^3 formula

(x+1)^3 = x^3+(3)(1)x²+(3)(1)xy²+1

x^3+3x²+3xy²+1

(a+b)^3 = a^3+3(1)a²b+3(1)xy²+1

a^3+3x²b+3xy²+1

(x+y)^3 = x^3+3(1)x²y+3(1)xy²+1

x^3+3x²y+3xy²+1
0
2014-08-03T14:23:03+08:00
(X + 1)(X + 1)(X + 1) = (X + 1)(X^2 + 2X + 1) = (X^3 + 3X^2 + 3X + 1) (a + b)(a + b)(a + b) = (a + b)(a^2 + 2ab + b^2) = (a^3 + 3(a^2)b + 3ab^2 + b^3) (x + y)(x+ y)(x+y) = (x+ y)(x^2 + 2x + 1) = (x^3 + 3(x^2)y + 3xy^2 + y^3)
0