Question

what is ( - a - b ) ³ ?
Pls tell the correct answer....​

Answer 1

(-a)^3-(b)^3-3(-a)(b){(-a)-(b)}

Answer 2

Answer:

( - a - b ) ³=- a³- b³ - 3a²b- 3ab = -( a+b)³

Step-by-step explanation:

( - a - b ) ³

Let - a=x and -b=y

WE know that

So (x+y)³= x³+y³+ 3x²y + 3xy²

Putting x= -a and b = -y

( -a-b)³ = (-a)³+(-b)³+3(-a)²(-b) +3(-a) (-b)²

Now (-1)³=- a³ and (-a)²= a²

( - a - b ) ³ = - a³- b³+3a²(-b)+3(-a)b²

( - a - b ) ³=- a³- b³ - 3a²b- 3ab = -( a+b)³