Question

va rog dau coroana ​

Answer 1

(a+b)³ = a³+3a²b+3ab²+b³

(a-b)³ = a³-3a²b+3ab²-b³

a) (1+a)³ = a³+3a²+3a+1

b) (a²-1)³ = a⁶-3a⁴+3a²-1

c) (2+x)³ = x³+6x²+12x+8

d) (1+2ax²)³ = 1+6ax²+6a²x⁴+8a³x⁶

e)

$(y + \sqrt{2} ) {}^{2} = {y}^{3} + 3 \sqrt{2} {y}^{2} + 6y + 2 \sqrt{2}$

f) (2x+3y)³ = 8x³+36x²y+54xy²+27y³

g) (5x+a)³ = 125x³+75ax²+15a²x+a³

h) (x-2y)³ = x³-6x²y+12xy²-8y³