Question

Write the following using suitable identities.
${(2x + 1)}^{3}$
​

Answer 1

Hey

we use the identity of (a-b)^3= a^3-b^3-3a^b+3ab^2

so by applying this identity

we get

(2x)^3-1^3-3 (2x)^+3 (2x)(1)^2

= 8x^3-1-3( 4x^2 )+3 (2x)

= 8x^3-1-12x^2+6x

hope it hlps★★★★

Answer 2

Step-by-step explanation:

Hey

we use the identity of (a-b)^3= a^3-b^3-3a^b+3ab^2

so by applying this identity

we get

(2x)^3-1^3-3 (2x)^+3 (2x)(1)^2

= 8x^3-1-3( 4x^2 )+3 (2x)

= 8x^3-1-12x^2+6x

hope it hlps★★★★