Question

(p+1)³,Expand it, using suitable identities.

Answer 1

(a+b)^3= a^3+b^3+3ab (a+b)
= p^3+ 1^3+3*p*1 (p+1)
= p^3+1+3p (p+1)
=p^3+1+3p^2+3p

Answer 2

Solution :

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We know the algebraic identity ,

( a + b )³ = a³ + 3ab² + 3ab² + b³

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Now ,

( p + 1 )³

= p³ + 3 × p² × 1 + 3 × p × 1² + 1³

= p³ + 3p² + 3p + 1

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