Question

2) Write the following cubes in expanded form: (2x + 1)³​

Answer 1

Step-by-step explanation:

(2x)3+(1)3+3(2x)2(1)+3(2x)(1)2

8x+1+12x2+6x

Answer 2

Answer:

(2x+1) ³

Identity-(a+b)³=a³+b³+3ab(a+b)

a=2x and b=1

(2x+1)³=

=(2x)³+1³+3(2x)(1) [2x+1]

=8x³+1+6x(2x+1)

=8x³+1+12x²+1

=8x³+2+12x²