Question

1. Expand (x+1)3 using an identity

















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Answer 1

Answer:

x³+3×1²×x+3×x²×1+1³ is the answer

Answer 2

Step-by-step explanation:

Question:- Expand (x+1 )^3 using an identity

Solution:- (x + 1)^3

We know that (x + y)^3 = x^3+y^3+3xy(x + y)

Here, x = x and y = 1, we get

(x + y)^3 = x^3 + (1)^3 +3(x)(1)(x + 1)

= x^3 + 1 + 3x(x + 1)

= x^3 + 1 + 3x^2 + 3x

= x^3 + 3x^2 + 3x + 1 Ans.

Used formulae:-

• (x + y)^3 = x^3+y^3+3xy(x + y)